FAT32 or FAT16 for memory card ? (OS X & Hero) - Hero, G2 Touch Q&A, Help & Troubleshooting

I'm moving the data off my stock 2GB card to a SANdisk 8GB Class 4 card to gain more media performance.
I understand FAT32 is better than FAT16 in this respect...
In fact the Hero formatted the card as FAT32 so assume it prefers it
Now, copying to the card, my Mac is copying very very slowly, far slower than the stock FAT16 card did.
Is this normal ?

Well done a bit of testing and the Album app is waaay slower on my class 4 8GB card formatted as FAT32.
Images in grid view and filmstrip view pop up more or less instantly on the stock 2GB FAT16 card.
On the FAT32, they appear as grey boxes before being filled in one by one with the actual image.
Note.
I've cleared Album's cache and data to force a rebuild of thumbnails, that thats not the issue.

joemax said:
Well done a bit of testing and the Album app is waaay slower on my class 4 8GB card formatted as FAT32.
Images in grid view and filmstrip view pop up more or less instantly on the stock 2GB FAT16 card.
On the FAT32, they appear as grey boxes before being filled in one by one with the actual image.
Note.
I've cleared Album's cache and data to force a rebuild of thumbnails, that thats not the issue.
Click to expand...
Click to collapse
ive noticed this aswell as i got me gf a hero at the same time as i got mine but only got a 8gb sandisk micro sd cardfor myself.
Her album photos with about 20 photos in is sweet as but when i scroll thorugh mine also with about 20 photo's in i have to wait for the grey boxes... when i got my 8gb card tho i didnt format nothing just plugged it straight in and started using it. everything else seems a little faster though compared to hers

My 8GB card was used in a Nokia N85 before so I had the Hero format it for me.
Assuming this would prepare it for use correctly...
Gone back to the stock 2GB card and all is zooming along nicely again.

Are you sure this isn't a caching issue guys? It may be slow to load on the first time while all the thumbnails are generated, but should be snappy afterwards. I would however be worried abou transfer speed between the SDHC Card and Mac as that should definitely be faster than a class 2.
When I changed from a class 2 to a class 6 I would say my read/write speeds doubled (or just over), I seem to get about 6-7MB/s when writing to it.
Have you tried writing to it when not in the phone? That will probably give a slightly better (or more realistic) reading.

Its not caching, I already tried clearing the applications (Album) cache and allowed it re-create its thumbnails in grid view and filmstrip view.
Opened each album and waited while it created them all.
Restarted the Hero and then went back to Album.
Still very slow compared to the 2GB card. No idea what class this is as it doesn't appear to say (writing on the backside is almost too small to read).
Writing to the card via my Mac starts fairly quickly, slows down to a real crawl and then a few minutes later speeds up again.
Worked fine in the N85 and recorded and played back video at a much higher bandwidth than the Hero can do.

FAT 16's limit is 2GB. so if you want to use a larger card then 32 is the way to go.
http://en.wikipedia.org/wiki/File_Allocation_Table

Thx for the info...
The problem I am seeing though is that the FAT32 formatted card appears to be far slower than the FAT16 card.

i forgot to add in my previous post that backing up the data to my pc was very fast on both cards, the only slow down i get is with the album app, exactly the same as joemax.
apart form that everything else is faster than my gf's 2gb card.
im gonna try backing up my data and formatting the card as i never tried that the first time
will report back with any findings.
edit:
tried formatting but made no difference, is fine with just 8 photos on, but once you start going to 20+ you get the grey box syndrome, which only last for 2 seconds or so before they appear but ofcourse would be nice if it was ultra smooth. could be that our sandisk 8gb class 6 cards are fakes .. i got mine of amazon for £15. i wouldnt of thought so but you never know, as everything else on the phone is running sweet.

I formatted the 8GB card in the Hero and in the card reader plugged into my Mac...
No change is speed at all.
Album is definitely far slower on the 8GB class 4 SanDisk card.

I just bought a generic class 4, 8gb memory card and the lag was terrible took an age for anything to load, so i went and got a class 6, 8gb card and the speed is back up to what it was when it came with the 2gb card. I strongly suggest anyone not to buy anything but a class 6 card.

Thx. Will look out for one on my travels.
Anyone know what class card the Hero ships with ? Mine does not say, if it does the writing is far too small for my eyes to read.

Heya Joemax,
I think you're getting the same problems as quite a few others. It seems to be some kind of problem the Hero is having with certain cards.
The problem being that it does not create and store the thumbnails for the Album gallery. The folder is created but the files are not. We are currently trying to work out why this would be, but i'm sure it's some kind of SDHC incompatibility with current Hero ROMs.

Related

16gb sd card

Anyone using the 16gb sd card? Are they worth it? Any problems with crashing? Amazon are selling Sandisk ones for £39.24, seems to be a good buy
I am using it a while (sandisk 16gb micro SDHC) but almost full (navigation maps, movies and music)
No problems with crashing.
I'm not using a 16gb but I'm using an 8gb card. It has to be the best thing I've bought for my Touch PRO yet. I have (most of) my music, (a few) movies, and TomTom all on one card.
A 16gb card would be a great investment though.
Just been looking at them myself, my only concern is the class they are, i heard and correct me if i am wrong you need a class 4-6 card for music and so on, due to the speed it runs at, and most 16gb ones i found are class 2.
I'm using Kingston 16GB Class 2. No problem.
Hi,
I also have a 8GB card but thinking of buying a 16gb card...my question is the apps I have installed.
Im not sure which apps I have installed on my card and which apps are stored on the HD's internal memory.
Would i simply copy the contents from the 8GB card to the 16GB card?
M3NF said:
Just been looking at them myself, my only concern is the class they are, i heard and correct me if i am wrong you need a class 4-6 card for music and so on, due to the speed it runs at, and most 16gb ones i found are class 2.
Click to expand...
Click to collapse
The 8gb that comes with the HD is only class 2.
I have a SanDisk 16gb class 2 and it works fine for all videos I encode with HD Encoder, and MP3 up to 320kbps that I have used.
Yes, it's a little slower copying files onto, but no big deal really.
i would really love to know what does the classes mean? will i see lot of improvements while going higher?
The classes of SD card are the minimum write speeds that the card will maintain. Basically comes down to 2MB/s, 4MB/s and 6MB/s. There are some details specified for how to measure this, but they aren't of much concern to the user.
The maximum read speed of the card may be different (likely). Both read and write speed will also depend on the device.
In short, you will notice the faster write speeds if you transfer music or films. I haven't noticed any problems when watching videos using my class 2 card, but can see the difference when copying from my PC to the cards.
thanks a lot for the information Taxythingy
Is there a massive difference between class 6 and class 2 while using the Touch HD? Or is the difference when you actually connect to the PC and transfer off and on?
AlanJC said:
The 8gb that comes with the HD is only class 2.
I have a SanDisk 16gb class 2 and it works fine for all videos I encode with HD Encoder, and MP3 up to 320kbps that I have used.
Yes, it's a little slower copying files onto, but no big deal really.
Click to expand...
Click to collapse
That i did not know, i always used my class 6 due to not knowing for sure if it would cause issues or not. (Had the 8 gig on my hermes).
I guess then if HTC themselves issue a class 2 then looks like i am wrong then, and maybe worth doing the upgrade myself.
samir_d said:
Hi,
I also have a 8GB card but thinking of buying a 16gb card...my question is the apps I have installed.
Im not sure which apps I have installed on my card and which apps are stored on the HD's internal memory.
Would i simply copy the contents from the 8GB card to the 16GB card?
Click to expand...
Click to collapse
I used a free program to create an image of my 8gb card before I switched to a 16gb. You can get it here: http://www.runtime.org/driveimage-xml.htm
All my programs worked fine and my phone never knew I switch to the 16gb.
I am using a 16GB Sandisk with no problems.
Works just fine.
Copying speed to the disk is OK for me.
​
I am using a 16gb Sandisk with absolutely no problems. I watch movies; listen to music/audio books run large maps for GPS etc. In fact, if an application will install on the SD card I do so. I do not see any lag or delays whatsoever. The only thing is I am running out of space I need to upgrade to a 32gb when they become available
didn't know it's possible to insert 16gb card to the blackstone.
thought it's not supported, but glad to know i was wrong.
so.. i've already ordered a 16gb sd card, but i would like to transfer all the files
currently on my 8gb card to the new one. can i do that without any problems?
just copy&paste all the files from one card to another?
I've been using a Nokia 16Gb cars for a while now, and no problems. It's a class 2 card and I haven't noticed any difference in the behaviour of the device since I put it in.
GoldCoin said:
didn't know it's possible to insert 16gb card to the blackstone.
thought it's not supported, but glad to know i was wrong.
so.. i've already ordered a 16gb sd card, but i would like to transfer all the files
currently on my 8gb card to the new one. can i do that without any problems?
just copy&paste all the files from one card to another?
Click to expand...
Click to collapse
I think the best method is to copy the contents of your current microSD to a new directory on your PC hard drive then copy all of the files from the new directory over to the new SD card. It doesn't hurt to make a backup of your SD from time to time.
sorry for taking a slight detour, but doesn anyone know when/if the 32gb cards are coming out? i've been holding off the 16gb and waiting for the 32gb one and i'm getting impatient
Hello!
Can anyone confirm that Nokia 16gb micro sdhc is works properly in HD or not?
Thx in advanced!

PNY 32gb class10 SDHC, mounted once, and never again?

so I just bought this card cause I use lots of storage space pretty quickly, My question is wtf is going on here? it just sticks on "checking for errors" and never gets past it, it mounted up once and while I was dumping files on it over USB from my computer (in usb mass storage mode) both it and my internal storage just disappeared, the copy operation failed, so I restarted the phone and I have yet to get the phone to mount it since then.
I'm running eclipse 1.3rc2, is this because of the sd flip-flop, the size of the card or the fact that it's class 10?
the card works perfectly fine in my camera, and in multiple PCs, but as soon as I stick it in my X2, it just doesn't want to work.
I noticed the stock SD card has a "bootable" partition flag, whereas this one doesn't. maybe this is my problem?
also what filesystem should I use, I run linux on my PCs so I can do whatever I want with it.
what if I just delete its partition table, put it in the phone and then let the phone format it? I've reformatted it with my PC and no dice.
Cheapxj said:
so I just bought this card cause I use lots of storage space pretty quickly, My question is wtf is going on here? it just sticks on "checking for errors" and never gets past it, it mounted up once and while I was dumping files on it over USB from my computer (in usb mass storage mode) both it and my internal storage just disappeared, the copy operation failed, so I restarted the phone and I have yet to get the phone to mount it since then.
I'm running eclipse 1.3rc2, is this because of the sd flip-flop, the size of the card or the fact that it's class 10?
the card works perfectly fine in my camera, and in multiple PCs, but as soon as I stick it in my X2, it just doesn't want to work.
I noticed the stock SD card has a "bootable" partition flag, whereas this one doesn't. maybe this is my problem?
also what filesystem should I use, I run linux on my PCs so I can do whatever I want with it.
what if I just delete its partition table, put it in the phone and then let the phone format it? I've reformatted it with my PC and no dice.
Click to expand...
Click to collapse
When I got the 8gb card and using now it was acting weird ...would copy files when in the phone. I formatted it using the phone and it has worked fine since.
Good luck.
I can't say it will work for u but it cured the problems I had at the time.
just make sure u format the right card since in eclipse its switched around and recognized as internal in menu.
well, It took exchanging it for a class 4, and now it seems perfectly fine.
so note to self (and others)
NO CLASS 10 CARDS IN DROID X2, IT DOESN'T FN WORK!
Cheapxj said:
well, It took exchanging it for a class 4, and now it seems perfectly fine.
so note to self (and others)
NO CLASS 10 CARDS IN DROID X2, IT DOESN'T FN WORK!
Click to expand...
Click to collapse
I don't think that is true...I thought I saw plenty of users say they use them.
Mine is class 6 and works just fine
Did u try formatting from in the phone while stock? Don't know if that would make a difference at all
I didn't read one single thread from someone successfully using a class 10 card without having issues, sometimes it took a few days/weeks, it only took me one mount/dismount cycle.
besides, the class 10 cards, while having a higher sustained transfer rate, their seek times and random access times are overall slower. basically these class 10 cards are ONLY good for digital video cameras and things that don't actually utilize a filesystem.
that or they're getting cheap chinese cards that are just remarked class 6 cards, the X2 can't read and write to a class 10 fast enough resulting in data corruption, period.
Yeah im not arguing
I understand what ur saying now
I can confirm class 6 being completely fine tho
I think the "issues" I had was the file size I was trying to transfer(4gb)
I don't think it's the class rating but the capacity. In my experience 32 gb cards just aren't as reliable as smaller-capacity ones. Perhaps it's a consequence of packing too many memory cells into such a small form factor, I don't know, but I've had three 32 gb micro-SD cards fail on me since the beginning of the year, whereas not a single 16 gb card has failed me yet.
I just dumped 4.8gb of crap on it, over usb and it took it like a champ, it's also significantly faster than the stock 8gb card in terms of mounting, remounting, scanning my media and even opening up fileexpert is faster.
class 6 i'm sure is fine, probably the best balance, but I can even take HD video straight to this card with no frame dropping or glitching. it's currently playing hd video on my hotel room TV right off the SD card w/ no issues (the stock 8gb couldn't do that)
Ha. Mine came wit a 2gb class 2 sdcard ...
Wait...now that I think about it.. I had bought a droid pro initially. It had a screen issue...I took it back and paid extra to get the x2. Then I told em I didn't wanna lose my pics/video I had taken and he switched the cards. So I guess he basically just kept the one I wax supposed to get instead of moving my data to the new one....prick...
iCurmudgeon said:
I don't think it's the class rating but the capacity. In my experience 32 gb cards just aren't as reliable as smaller-capacity ones. Perhaps it's a consequence of packing too many memory cells into such a small form factor, I don't know, but I've had three 32 gb micro-SD cards fail on me since the beginning of the year, whereas not a single 16 gb card has failed me yet.
Click to expand...
Click to collapse
what brand(s)?
I'm using a Patriot LX 32GB Class 10 MicroSDHC now. I came from a Lexar 32GB class 10 which failed within a month. I haven't had any problems with the Patriot.
i am using a class 4 32gb card and transfer 16g of music on and off at one time constantly with no problems. i have had it since july
ninjasailas said:
i am using a class 4 32gb card and transfer 16g of music on and off at one time constantly with no problems. i have had it since july
Click to expand...
Click to collapse
post the brand too.... this info is not useful.
in my case the 32gb class 10 pny card worked fine in everything but this damn phone.
L2_n19h7m4r3 said:
I'm using a Patriot LX 32GB Class 10 MicroSDHC now. I came from a Lexar 32GB class 10 which failed within a month. I haven't had any problems with the Patriot.
Click to expand...
Click to collapse
I use the 16gb of this and it works great. I did hear more than once that even a good 32 gb can be a problem.
My pny class 10 32gb is still rockin with not a single error
from my X2 roaming the north

16 gb sd card

is it ok to buy 16 gb sd card for my mini not pro
i mean that the won't be slow ....etc ?
it is ok, i have an x10mini too, and i'm using a 16gb sdcard in it, and it's working very fine and fast, so just go buy it and enjoy
Here another 16GB SD card user.
For me its perfect, I have no feeling that it slow down or something
i got a new 16GB SDHC card couple of weeks ago, but since then my phone sometimes restarted itself, and some apps is running very bad, particularly Waze (it's a GPS programm). I tried to format the card with the PC and phone also, but still same results. I had a 2GB card, and had no any problem it all...
Any ideas what may be the problem?
Thank you in advance
I'm using 16 GB card, and my phone is speed. It's no slowest xD
Can you tell me please what card exactly do you use?
Thank you
i use 16gb sdhc class 6.. work very well!
rspy said:
i use 16gb sdhc class 6.. work very well!
Click to expand...
Click to collapse
10x, but what is the brand of the card?
dima_vy said:
10x, but what is the brand of the card?
Click to expand...
Click to collapse
Buy this..
Sandisk..
http://www.amazon.com/gp/aw/d/B001F7AJKI/ref=mp_s_a_1?qid=1323809459&sr=8-1
Thanx!
This one i already had, and sucessfully returned to ebay top-seller. I ordered kingstone, i hope it will be better
I have A-data 16GB sdhc 10 class and it is working perfectly, even with apps on sd.
In case someone need a check about SD working
I have a SD 16GB Kodak class 4 and it works perfectly on my Mini
Problem with SanDisk 16GB microSDHC
I also already had a 16 GB SanDisk, I bought it on amazon. I'm still trying to return it, my phone restarts every time I try to format it.
i tryed a sandisk 16gb too but restarts alwasy
after buying a new one from kingston class 4 it works perfectly
sry for bad english
I have A-data 16GB sdhc 10 class and when i copy my files and i extract from the pc my phone don't recognize my memory and when i insert one more time and say my pc that the memory don't have format and i have to format one more time. Someone can i help me?
try formatting the block size to 32KB
An sd card does not need to be formated only hdd do... What couldve hapend is that your boot sector got screwed up. Try putting your sd card in an card reader and connect it to the pc. On windows 7 go to start type cmd and hit enter. Then type: chkdsk /X /F /A:, where A: is your card reader. Hit enter and wait. I revived a couple SD Card by this method. Without losing any data!
***Ignore this***
Edited for clarity.
I have a Class4 16 gb card. Worked well so far.
Guys - Can we lose the personal criticism here - this thread is bang on the money with a problem I'm really struggling with and I'd hate for the thread just to become a shouting match.
My daughters x10 Mini Pro (running latest paul-xxx version of CM7) is just refusing to play nicely with a Sandisk 8Gig Class 4 SDHC which has prviously worked perfectly in a Samsung Genio.
On the 8 Gig card music jumps between tracks as you are listening , apps moved to SD Card refuse to run, photos save OK and will open once in Gallery but then the jpgs get corrupted and cannot be reopened on the phone or when transfered to a PC.... and to crown it all I get random reboots/freezes.
If I drop back to an old Kingston 2 Gig Micro-SD (ie non-SDHC) everything on the phone works fine and yet when I format the 8Gig card on my PC, there are never any errors and I can then copy files on and off the card (via the card reader in the PC) multiple times with no issues.
Is this just a somewhat more extreme example of other peoples experiences or would you suspect my micro SD is b*ggered?
I suspect that this "quality" Sony phone is just so sensitive to SDHC cards that I need to get one which others can confirm works reliably and stick to it.
For now my daughter is content to run with the 2 Gig card and have a stable, working phone but obviously she'd like to carry more than a dozen Albums and Apps at any time.
Any advice?

16gb NT SD dual boot w/CM7 - Just me or really unstable?

Brand new 16gb NT. Dual booting CM7 from the SD card, which is a brand new PNY 16gb Class 10. NookOS still on the internal. It just seems unstable-y to me.
First of all I have the wifi issue which seems to be common. It drops the signal quite a bit even when I have a seemingly strong commection and also doesn't always want to turn right on after sleep. I'm willing to chalk some of that up to my router, especially the dropping, but I thought I'd mention it for posterity.
I also get lots of reboots. It seems to happen most when I have a few things running. Have the gall to install an app while having Gmail open, then the audacity to open Gtalk on top of that? Boom! Reboot. You get the idea.
It's also just sluggish in general, be it with web browsing, games, music, etc. Netflix makes me feel like I'm running it on a Pentium II. And Yahoo mail arguably doesn't work it's so slow. Lots of system notifications and "force closeds."
I've also had the issue where I couldn't get it to boot CM at all. It would get to the splash screen then freeze and reboot. More than once I had to reformat the card and start over.
Surely this isn't what I should be experiencing. Will it help to root it and install to the internal? I wanted to keep NookOS on there in case I want to sell it and upgrade.
Any thoughts?
I started with the PNY and found the same thing. I switched to an 8 GB Sandisk Class 4 and could not believe the difference. It has to do with the small block write speed and the PNY is SLOW.
There is a lot of material in the forum about what brand and speed of micro sd to use. If you are curious you can search.
I have a 32 GB Sandisk Class 4 on order and intend to transfer to it when it comes and I find out how.
Bill
Its likely because you are using a higher class sd card. Drop down to a class 4 and you'll see an improvement.
Cubanluke88 said:
Its likely because you are using a higher class sd card. Drop down to a class 4 and you'll see an improvement.
Click to expand...
Click to collapse
miniblue said:
I started with the PNY and found the same thing. I switched to an 8 GB Sandisk Class 4 and could not believe the difference. It has to do with the small block write speed and the PNY is SLOW.
There is a lot of material in the forum about what brand and speed of micro sd to use. If you are curious you can search.
I have a 32 GB Sandisk Class 4 on order and intend to transfer to it when it comes and I find out how.
Bill
Click to expand...
Click to collapse
So is it the class 10 cards altogether, or just PNY?
I would say class 10 in general is a bad idea. Its a misconception that higher class = better, in general. They are better for camcorders/digital audio recorders, but that's about it. In general you should stick to class 4 cards.
I can't speak on that brand personally. I only use SanDisk cards.
Amazon has the 32 GB Sandisk Class 4 for less than $16. You can get 8 gb for less than $8. Go for the bigger one if it fits your pocketbook.
Bill
Ok, so I have to get a new card. Maybe I can unload this one on Craigslist.
What about just rooting it and installing to the internal? The only thing is now I guess the NookOS is bricked as I cant get back into it. Can I unbrick with a class 10? The thread said to use a class 4.
If you want to run internal cm7, simply create a clockworkmod bootable sdcard (same process you did for cm7 on sdcard, but with the cwm image). Then download the cm7 zip file to the sdcard or your internal memory, boot into clockworkmod via the sdcard and install from zip. Download and install gapps in clockworkmod as well if you want the play store/google apps.
A quick question off topic...I went to get a copy of the internal CM7 and the link in the development forum isn't working...any idea where I can find a working link?
Thanks,
Nikkie

[Q] SD card issue with I9300? Problems with 64GB microSD cards?

I have seen one mention of someone having problems with their 64gb microSD card. Something about only being able to put on 3 games.
Now I asked them if perhaps they got a fake card, the card or their phone might be faulty? And if they have tried to get replacements.
As I have seen many on here talking about and buying various 64gb ranging from class 6 to class 10 / uhs 1..
I see people running speed tests and all around touting their happiness with it's performance in the SGS3.
So my question is how many, if any, have a problem with their SD on their SGS3?
Provide, if you would be so kind, any details that would help, such as brand, size, model.
I really hope it's an isolated issue.
Thanks,
-CC
had no problems with mine, just put it in and it worked straight away, using a
Sandisk 64gb microsdxc class 10 uhs 1
With only a few votes, so far with 6 Sandisk 64gb microSDXC class 10 uhs 1 owners..
Looking good in hopes for my delivery from Amazon in 5 weeks
We've got 8 votes for 64gb class 10 and no posted complaints from those 8 on this thread at least. Sounds promising still so far
I'm using a Sandisk 64gb microsdxc class 10, however sync seem to fail with Mediamonkey and Media player.
Initial sync works fine writing 40GB of mp3 however subsequent sync reports error/hang.
Card works fine in a PC and I tested it with 50GB of 1080P movies, it copied there well and played back flawlessly, so I think my card is good..
However there is something up with MTP sync....
Found 3 others people with the same issue here: http://www.mediamonkey.com/forum/viewtopic.php?f=12&t=66514
I'm gonna try syncing with kies tonight...
Everyone posting success with their 64GB sdxc, can you specific how you sync your media to the card?
Just straight drag and drop, Windows Media Player, Media Monkey, Songbird etc ?
I have a 64GB but I don't get my phone until (hopefully) later today. I did vote, I'll let you know how it goes until I get the S3.
smoothiex said:
I have a 64GB but I don't get my phone until (hopefully) later today. I did vote, I'll let you know how it goes until I get the S3.
Click to expand...
Click to collapse
Thanks you, you can also report issue here:
http://forum.xda-developers.com/showthread.php?p=28671275#post28671275
The only problem is that you can cannot install programs in the Extsdcard because the galaxy s3 says the internal memory card IS NOT REAL, BUT IT IS EMULATED,
it doesn't mention at all that you have a 64gb in The Extsdcard...... AND I have a GENUINE 64 GB SanDisk ExtSd installed...
Sent from my GT-I9300 using xda premium
In the phone specifications you only have a 32gb external memori but if you format the 64gb sd inside sgs3 sometimes it recognizes it well. Try everything. :good:
Im using the 64GB class 10 and I did find I had to reformat it to fat32 as I was getting problems with exfat, like unseen folders in mtp mode and missed songs in my music folder even though all files were there.
Since then no probs at all and I use a drag drop system with syncing media although the 1st time I transfered my itunes songs(1922 tunes) I converted them all to mp3 and put the sdcard into an adaptor to speed up the transfer.
My 64gb ExtSd is working fine the problem is when trying to move apps to it with programs like Move2sd and the like. Then it says that the my Internal memory. Is NOT REAL BUT EMULATED
Sent from my GT-I9300 using xda premium
I am having great problems with a 64gb Class 10 card. If the data is copied to the disk before being inserted in the phone it registers as a damaged card.
However if you clear all the data via the PC then insert the blank disk it is recognised normally. You can then transfer the same data via a USB link from the PC via the MTP application. You may well have to load the Samsung USB drivers.
Sadly if you restart the phone it immediately reverts to the damaged card error message and you have to go all through the same procedure again. No ideal.

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