What's the difference between the classes of SD cards? Which one is best for the Atrix?
Sent from my Atrix
The higher the class the better it usually is depending on who makes the sd card. Sandisk is the best in my opinion even though the class cards get very expensive for them. But each card I have bought from sandisk have never failed on me. Try googleing class card speed and their should be a few guides put out there about them. I don't know personally if the ATRIX can handle the very high classes but I could be wrong.
Sent from my ATRIX using the Premium XDA App
mugabuga said:
What's the difference between the classes of SD cards? Which one is best for the Atrix?
Sent from my Atrix
Click to expand...
Click to collapse
The answer to your first question is "SPEED" and that is it. It has nothing to do with who manufactured it (except indirectly in that lesser known mfrs may lie or exaggerate about their speed.)
In order to identify it as Class 4 or Class 10, it must have speed that fits in that classification.
Here are the basics.
Class Speed
Class 2 2 MB/s
Class 4 4 MB/s
Class 6 6 MB/s
Class 10 10 MB/s
Hope that helps.
FWIW, I am using an A-Data Class10 16GB card and it is smoking fast. No skips or pauses when playing media.
nunjabusiness said:
The answer to your first question is "SPEED" and that is it. It has nothing to do with who manufactured it (except indirectly in that lesser known mfrs may lie or exaggerate about their speed.)
In order to identify it as Class 4 or Class 10, it must have speed that fits in that classification.
Here are the basics.
Class Speed
Class 2 2 MB/s
Class 4 4 MB/s
Class 6 6 MB/s
Class 10 10 MB/s
Hope that helps.
FWIW, I am using an A-Data Class10 16GB card and it is smoking fast. No skips or pauses when playing media.
Click to expand...
Click to collapse
Hey I learned something today. thanks.
Sent from my ATRIX using the Premium XDA App
I am using a Transcend, class 4, 16GB card and also have no issues with skipped music, or recording/playback of videos. The only place I see a difference is with benchmarks if I drop in a class 10 from one of my other devices. Other than having higher benchmarks I see no advantage to paying the extra cash for a class 10 sdcard for the Atrix.
I copy large files often to my phone and also for when I make full SD card backups. It makes the process so much faster. Well worth the extra cash. Time is money afterall
now im wondering if my "frozen" songs its because my sd card.
i'll buy one class10 and see, my sd even show the class, should be class 1
The answers are right on. I have a 16gb class 4 and it is a lot better than the 8 gb class 2. Transferring zip files is a breeze. I am sure a higher class will be in my future.
I have a class 10 I got on sale and coming from my class 4 I could not go back. I do a lot of music transfers and the class 10 is a night and day difference
Sent from my MB860 using xda premium
Pbwizkid said:
I have a class 10 I got on sale and coming from my class 4 I could not go back. I do a lot of music transfers and the class 10 is a night and day difference
Sent from my MB860 using xda premium
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Sounds like I need to make another purchase...thanks man!
abomb78 said:
Sounds like I need to make another purchase...thanks man!
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Click to collapse
Ya just make sure you shop around a bit and watch for deal i got my 16gb class 10 for 25 bucks from some site doing a 2 hour sale or something
Related
Does anyone have a Class-10 MicroSDHC card running on their Atrix? If so, how's it performing? Thanks.
Ya I want to know this too has someone tried different classes?
Sent from my Atrix 4g using XDA Premium App
i have class 4, 6, and 10 and honestly i cannot tell the difference under normal use. The only reason I got class 6 then upgraded to class 10 was for apps2sd on my nexus. I havnet done any formal tests, but from practical, every day use, no difference.
I do transfer files a lot from pc to phone so of course class 10 transfers them quicker. But normally you are not running many things off of SD, maybe music, which class 2 or 4 is good enough for.
NguyenHuu said:
i have class 4, 6, and 10 and honestly i cannot tell the difference under normal use. The only reason I got class 6 then upgraded to class 10 was for apps2sd on my nexus. I havnet done any formal tests, but from practical, every day use, no difference.
I do transfer files a lot from pc to phone so of course class 10 transfers them quicker. But normally you are not running many things off of SD, maybe music, which class 2 or 4 is good enough for.
Click to expand...
Click to collapse
I am still on the good old 4 GB card I bought a couple years ago. Fares pretty good for all day-to-day activities.
I just put in a class 6 16GB and I don't notice that big of a difference. I don't think you'd really notice a difference unless you were looking hard.
The higher the class of card, the faster the read/write speeds are. Things is, you will only see these speeds if you are transferring big files. If you are just putting MP3's and small videos on the card, you won't see much of a difference. Sequential Write speeds are significantly faster than Random Write speeds, but Sequential Read speeds vs Random Read speeds, there is not much difference.
NguyenHuu said:
i have class 4, 6, and 10 and honestly i cannot tell the difference under normal use. The only reason I got class 6 then upgraded to class 10 was for apps2sd on my nexus. I havnet done any formal tests, but from practical, every day use, no difference.
I do transfer files a lot from pc to phone so of course class 10 transfers them quicker. But normally you are not running many things off of SD, maybe music, which class 2 or 4 is good enough for.
Click to expand...
Click to collapse
Have you tried the Class-10 card in the Atrix? If so, which model/size is it? Thx.
Everyone: Thanks for your inputs!
Class Speed rating ONLY applies to WRITE speeds - has nothing to do with read speeds. Primarily designated for camcorders and other devices that need guaranteed minimum speed for writing data.
The camcorder on the phone doesn't require a specific card class, so spending money on higher speed cards is not a great idea. If you are copying movies from pc to sd regularly then it will save you a bit of time - that is all.
http://www.sdcard.org/developers/tech/speed_class/ and wikipedia explain SD speed pretty simply.
I ordered a 32GB Lexar Class 10 microSDHC. Should be getting it today so I'll post my findings. Planning on dumping all my music and maybe a few videos.
ashdog said:
I ordered a 32GB Lexar Class 10 microSDHC. Should be getting it today so I'll post my findings. Planning on dumping all my music and maybe a few videos.
Click to expand...
Click to collapse
Looking forward to your findings! BTW, where did you purchase it? Thanks.
Bought the Patriot 32g class 10 ...and its crazy fast. Love it.
Sent from my Atrix using XDA Premium App
s1ickwi11y said:
Bought the Patriot 32g class 10 ...and its crazy fast. Love it.
Sent from my Atrix using XDA Premium App
Click to expand...
Click to collapse
Excellent! I'll be picking one up. Thx.
I bought the Lexmar 32gig class 10. I don't see a huge difference unless I'm loading up the card with a lot of files at once.
Yes its as fast as the Patriot from all the specs I've seen but unless you can truly afford the minor difference, just get a lower class.
Sent from my MB860 using XDA App
Saw a post FROM MOTO on the moto forums that says the Atrix can make use of the extra speed up to Class10.
FWIW.
My Kingston class 10 32GB card does not play nice with webtop2sd. However, I can format it with the system. I have not tried to write files to it but writing fat32 filesystems works for sure. It seems as if I can read from the card too. I see the folder created during the fat32 partition creation.
The issue I seem to have is that it cannot create extfs filesystems on the card using the phone. I can use gparted to make the filesystem, but then webtop2sd cannot read it.
http://www.microcenter.com/single_product_results.phtml?product_id=0304662
Anyone know what class this is?
Thanks
nitrogen618 said:
http://www.microcenter.com/single_product_results.phtml?product_id=0304662
Anyone know what class this is?
Thanks
Click to expand...
Click to collapse
It doesn't say.
Here: http://www.ebay.com/itm/16GB-Class-...ory_Card_Readers_Adapters&hash=item2a17118086
Class 10 16gb = 22$, 32 gb class 10 = 50$
nitrogen618 said:
http://www.microcenter.com/single_product_results.phtml?product_id=0304662
Anyone know what class this is?
Thanks
Click to expand...
Click to collapse
I'd bet Class 4.
http://www.amazon.com/Patriot-Signa...FTCK/ref=sr_1_1?ie=UTF8&qid=1324259287&sr=8-1
Nice name brand card from a solid seller (obviously). Prime free 2 day shipping. Had mine awhile and the 16GB works great.
Actually, I want a Class 4 card, due to the high performance of Random write. It's a LOT faster than class 10 cards.
Thanks guys.
not sure really
nitrogen618 said:
Actually, I want a Class 4 card, due to the high performance of Random write. It's a LOT faster than class 10 cards.
Thanks guys.
Click to expand...
Click to collapse
I believe these are current classes and speeds:
Class Speed
Class 2 2 MB/s
Class 4 4 MB/s
Class 6 6 MB/s
Class 10 10 MB/s
Class 10 is over twice as fast as class 4.
That's not all there is to it. Sustained write speeds are different from random write speeds. Its good to have a balance of the 2. Not all brands of cards are created equal. Some class 10 cards do not perform as well as say a sandisk class 4.
Sent from my Samsung Galaxy S II
I just got my class 10 card in the mail today and stupid question I put in but now how do I use it? Like if I wanna put backups on it or move my music or do I need to format it?
Sent from my SAMSUNG-SGH-I777 using XDA App
Anyone? Can I search from the phone xda app. I want to find out the best way to use the sd card. It says 16gb but only has 14. I' d really like to safely put or move my backups and rooms and mods to it and set it as default for 1080p video recording.
Sent from my SAMSUNG-SGH-I777 using XDA App
I downloaded this app, and changed my sdcard from 148 to 2048 (its a class 10 16gb, it made pictures load faster and some other stuff) But how do you measure your SD card's read/write speed?
Like here: http://androidforums.com/lg-optimus-m/307607-class-10-microsd-cards-faster-app-loading.html
hello i just got an amaze and with its camera and video quality i think i need a better sd card as my current one is class 2. any recommendations and letting me me know what the phone can handle without paying for more than i need would be greatly appreciated.
thanks very much
The Amaze can handle a class 10 memory card. This would be preferred as it has the fastest read and write speed that I know of. I am currently using a 16GB class 6 SanDisk and it works really well.
Hope this is helpful. Or maybe someone else can give you more info.
Sent from my world to yours using an HTC Amaze
windcan said:
hello i just got an amaze and with its camera and video quality i think i need a better sd card as my current one is class 2. any recommendations and letting me me know what the phone can handle without paying for more than i need would be greatly appreciated.
thanks very much
Click to expand...
Click to collapse
This should do the trick.
http://www.amazon.com/AmazonBasics-...H4U0/ref=sr_1_2?ie=UTF8&qid=1325371114&sr=8-2
Looks like it may be worth it to go straight to class 10.
Thanks
PNY class 10.
Sent from my HTC Amaze 4G using xda premium
I just got a Samsung 32gb class 10 and it works great.
what is "PNY"?
windcan said:
what is "PNY"?
Click to expand...
Click to collapse
PNY is just a brand
Picked up a Lexar 32gb class 10 for $45 on boxing day. (for you Americans, that's the day after Christmas)
lol
marleyfan61 said:
Picked up a Lexar 32gb class 10 for $45 on boxing day. (for you Americans, that's the day after Christmas)
Click to expand...
Click to collapse
Sent from my HTC Amaze 4G using XDA Premium App
Confused
My Amaze is on it's way to my door this Wednesday, and I too am on the hunt for a good class 10 micro SD card. I had a Patriot 32 GB ordered from Amazon (it had 4+ stars), but then I started reading specific user ratings. It almost looks as though there is a problem with quality/consistency with many of the 32GB class 10s. The Patriot, and several others, had quite a few recent users complain that their class 10 doesn't run any faster then their old class 2 or 4. (The complaints I tried to focused on are from users who had run speed tests and didn't just provide seat-of-the-pants analysis.) Admittedly, I was going for as cheap as I could (the Patriot was only $47), but I looked at several others and they had spotty speed comments as well.
Does anyone have specific knowledge or insight on this? Is it an issue with lower cost manufacturers whereby one card is great but the next can be dreadful. Is it the nature of the beast?
I appreciate your comments.
A class 10 card isn't the way to go with smartphones. Best to get a class 4.
Sharpshooterrr said:
A class 10 card isn't the way to go with smartphones. Best to get a class 4.
Click to expand...
Click to collapse
really, class 4, why?
too late for me, order my 32gb class 10
curious to understand this whole thing
thanks
Sharpshooterrr said:
A class 10 card isn't the way to go with smartphones. Best to get a class 4.
Click to expand...
Click to collapse
I could understand saying a class 10 isn't necessary, but to say it isn't the way to go, a class 4 is best doesn't make sense. Care to explain why?
UHS-1 Cards
I just read where UHS-1 class microSD's "were made for mobile devices". Something about being specifically designed to work with those operating systems. Anyone have experience with any of those? They're awfully expensive.
If you uses a class 2 SD card with a capacity of less than 16Gb and mostly uses it to transfer small files between your phone and PC - that would be sufficiency enough.
If you intend to use a bigger card, say, 32Gb or 64Gb and you are doing a lot of transferring MP3, movies, pictures ect ... especially if moving BIG files, say, more than 1 Gb each (e.g a full MP4 movie may take up to almost 2Gb)
OR
You are frequently backup your SDCard contains and moving them between PC and phone. You will appreciates the higher speed/class of your SDCard. Higher class means higher speed in reading and writting hence saving you a lot of time.
You will not notice much differences between a class 2 and a class 10 card when using it inside your phone though.
An SDCard speeding test's result will be differ from devices and that's exactly manufacturer's stated on their package/info, but, basically you got what you paid for. As we all know, Sandisk is the most expensive card out there and there is a reason for it, just do a little research and you'll know why. Sandisk classed their card at the minimum speed that their cards are capable of, whereas other manufacturer tend to class their card at the average speed that their cards capable of. Meaning a classs 10 Samsung/PNY/Patriot card may not capable of reaching the claimed speed (because, well, results are varies on devices) and the result maybe a little lower than claimed (I've tried Samsung class 10 and PNY class 10 test and the result is somewhere more or less than 9Gb/s writting).
Anyway, a class 2 16Gb Sandisk card is good enough for an average user whereas a higher class/capacity card will increase performances for those who demand more for their task/hobbies/usage
I would agree with the post above, right on the spot. I had a 8 gb class 4, 16 gb class 4, and now 32gb class 10. Did not visibly notice speed in my phone but did notice it when transferring files. You will only benefit when transferring larger files like 1 gb or more.
I only transfer my recorded videos, pictures, mp3 and that's it. I think i once transferred a movie or two.
What would have taken me 1 hr on 16 gb class 4 took me 20 - 30 min on my patriot 32 gb class 10. No problems on it since nov so far.
Sent from my HTC Amaze 4G using xda premium
Sharpshooterrr said:
A class 10 card isn't the way to go with smartphones. Best to get a class 4.
Click to expand...
Click to collapse
I have a class 4 card and the video is choppy when using HD recording. It can't write the larger amount of data fast enough.
A class 10 FTW
marleyfan61 said:
I could understand saying a class 10 isn't necessary, but to say it isn't the way to go, a class 4 is best doesn't make sense. Care to explain why?
Click to expand...
Click to collapse
http://www.xda-developers.com/android/32-gb-micro-sd-analysis-speed-test/
anything over class 4 sacrafices random read/write speeds...meaning, just to write faster the data is more fragmented. Over time, the speed becomes slower and the table used to keep track of data must access parts of the fragments that are free...this reduces performance in higher class cards...if you look at Sandisk they their class two performs way above the minimum write speed, almost double...I always buy sandisk...nothing else...their quality is unmatched...they are the pioneers...A class 4 or class 6 sandisk would outperform many of the class 10's that people are buying right now.
Sometimes as Binary's card has, they lose integrity because of this reason...the index becomes messed up and the data becomes lost eaiser in higher class SD cards and lower quality SD cards...I believe Sandisk tries to minimize this even in their higher speed cards...
---------- Post added at 05:56 AM ---------- Previous post was at 05:34 AM ----------
If you guys take a look at the bitrate of the 1080p video and also add the audio bit rate it doesn't even come close to being 2 MB/s write speed which is a class 2 SD card...the highest bitrate for video I got was 11182 (kilobits per second) = 1.36499023 megabytes per second...add the 127kbps of sound and you barely have 1.4 MB/s write speed needed for the HD video recorded by our amaze...hope this clears things up.
Hi guys,
I'm thinking of picking up an SD card for my prime when it comes in. Does anyone have any recommendations as to which class I should get?
I'm thinking 6 or 8 minimum, esp since I will likely end up watching movies (avi, mpg, mkv) off the card. Has anyone tried doing this yet or testing which class SD cards work best?
Gracias
Transcend 16G class 10 works super fast. Love it. My only choice.
And it's not expensive in my region (TW).
I tried a class 4 on my old Advent Vega. When there was no comparion, class 4 seemed ok. But now after a class 10 card experience, I don't think I want to settle for anything less fast.
Looks like Sandisk 32GB Class 4 is what a lot of people are recommending.
Source: http://forum.xda-developers.com/showthread.php?t=1150369
Just received the SanDisk 64 GB microSD Class 6. Getting 7.3-7.5 MByte/s write speeds.
Also have a Samsung 32 GB Class 10, getting 11-12 MByte/s writes.
Write speeds returned on transferring big files (>600 MB) only.
SanDisk comes exFAT formatted so you can put files >4GB on it (very handy for those big mkvs). Samsung comes FAT32, but keeps same high write speeds when formatted exFAT. 64 GB works well with the Prime.
Any way to get rid of the SD card notification in the notifications? Been messing with it for a lil while and can't figure it out...
I have a lexar 32GB class 10...
Sent from my Transformer Prime TF201 using xda premium
beazie0885 said:
Any way to get rid of the SD card notification in the notifications? Been messing with it for a lil while and can't figure it out...
I have a lexar 32GB class 10...
Sent from my Transformer Prime TF201 using xda premium
Click to expand...
Click to collapse
Probably not until custom roms :-\
Thanks for the replies guys, that tid bit about exfat is golden
Sent from my Desire HD using xda premium
whats the max capacities / speeds on the microSD cardslot? no use getting something that i cant use
If anyone could let me know i would be thankfull
what app are you using to test the read /write speeds? I was using SD tools on my sgs2 but can't get it to work on my prime...
Sent from my Transformer Prime TF201 using xda premium
CrystalDiskMark is real good for testing card speed (from a PC).
After reading a HUGE thread here on XDA about all the classes and how it can vary depending on your need, I opted for a class 4. I was convinced I needed class 10, but after reading that entire huge thread I came to see that for my needs, class 4 was fine and perfect and class 10 of little actual value. So I got a very highly rated Transcend 32gb class 4 off Amazon.
Lock-N-Load said:
After reading a HUGE thread here on XDA about all the classes and how it can vary depending on your need, I opted for a class 4. I was convinced I needed class 10, but after reading that entire huge thread I came to see that for my needs, class 4 was fine and perfect and class 10 of little actual value. So I got a very highly rated Transcend 32gb class 4 off Amazon.
Click to expand...
Click to collapse
do you use it for playing mkv's? that's what i would want it for mainly.
...to run optimally while recording video/taking pics?
Or can you get by with a lesser class (6) or so?
Just wondering what everyone is using and why.
I have a 32GB class 4 SanDisk and it works great.
Sent from my Energized Amaze
I also have a 32gb class 4 (SanDisk). I haven't noticed any lag when picture taking or video recording.
I was looking up what kind of MicroSD to get my Amaze about a month ago and decided to get this one. Here are some things I picked up while doing the research.
1. Small read/writes usually takes place on the SD cards. Getting a class 10 with good write speeds for large files doesn't mean good speeds with small files.
2. SanDisk is a good brand. Mine is advertised as a class 4 but performs at class 6.
3. If you're looking at the Patriot class 10 microSD, I recommend that you stay away from it. People have been reporting errors with that card on Android devices. Patriot said that they've fixed the issue, but there are still a lot of bad cards floating around. You never know what you get.
4. If you do go with SanDisk, get it from a reputable dealer (not eBay). There are tons of SanDisk counterfeits.
Thanks so far guys - exactly the input and information I was seeking.
I have a 8g Class 6 from my G2, and a 4g Class 10 I paid $6 for to test out - both by Transcend off newegg.
Will get something with more capacity soon, and was wondering which direction to head.
I just got a patriot 16gb class 10 about a week or two ago from newegg for $10 ($20 with a $10 rebate) and it's awesome. I mostly notice it when transferring files (videos and music) between my phone and laptop. I had a 16gb class 6 ADATA before this one, but it was only 12gb cuz I originally used it with my G1 and had it partitioned.
My wifi downloads have been quicker lately, but I'm sure that's just coincidence. Anyways, good luck!
Sent from my HTC_Amaze_4G using XDA App
Higher classes are more prone to errors. With the bitrate phone records hd. A class 2 is way more than enough. Go with a class 4 SanDisk. Higher classes have better sequential good for recording movies etc. Lower classes have better random read right and less prone to long term damage. The higher class you go the more risk you'll have of getting corrupt data etc. The only benefit of higher class is better sequential write speeds. ALWAYS GO with sandisk
seansk said:
Higher classes are more prone to errors. With the bitrate phone records hd. A class 2 is way more than enough. Go with a class 4 SanDisk. Higher classes have better sequential good for recording movies etc. Lower classes have better random read right and less prone to long term damage. The higher class you go the more risk you'll have of getting corrupt data etc. The only benefit of higher class is better sequential write speeds. ALWAYS GO with sandisk
Click to expand...
Click to collapse
If I had known this sooner, I wouldn't have invested in a 32GB Class 10 disk (not sandisk). So far, I've had it crash twice, and had to reformat every time. It's rather annoying and you do lose all your data; so for those out there still considering it, please add this to your factors of consideration.
16 GB class 6 SanDisk. No lag. No problems.
Sent from my HTC_Amaze_4G using XDA App
daeboe said:
If I had known this sooner, I wouldn't have invested in a 32GB Class 10 disk (not sandisk). So far, I've had it crash twice, and had to reformat every time. It's rather annoying and you do lose all your data; so for those out there still considering it, please add this to your factors of consideration.
Click to expand...
Click to collapse
Always buy sandisk. I have not heard of any sandisk going bad but heard of all other brands going corrupt over and over. I don't believe sandisk has a class 10 or class 8. They always stick to stability and quality and is worth the price. Besides a class 4 sandisk usually outperforms a class 6 or 8 of other brands. Search for my posts regarding memory topics in accessories I talk about sequential read write and random read write and how the bit rate our phone records video in HD is waaaay below even a class 2. a good balance of sequential read write (long files such as videos or movies) and random read write (gigs of small files) is either a class 4 or class 6 if i was going to go allout I would get the new 64gig card made by sandisk for mobile phones. I think its a class 6
seansk said:
Always buy sandisk. I have not heard of any sandisk going bad but heard of all other brands going corrupt over and over. I don't believe sandisk has a class 10 or class 8. They always stick to stability and quality and is worth the price. Besides a class 4 sandisk usually outperforms a class 6 or 8 of other brands. Search for my posts regarding memory topics in accessories I talk about sequential read write and random read write and how the bit rate our phone records video in HD is waaaay below even a class 2. a good balance of sequential read write (long files such as videos or movies) and random read write (gigs of small files) is either a class 4 or class 6 if i was going to go allout I would get the new 64gig card made by sandisk for mobile phones. I think its a class 6
Click to expand...
Click to collapse
I had to send my 32gb class 10 Sandisk in to get replaced because of data corrpution. I agree though, Sandisk is great.
I have a Samsung class 2 8gb. Pretty good for waht I use it
Sent from my HTC_Amaze_4G using xda premium
I have SanDisk 16GB Class 2, I bought a class 10 and its actually slower than my Class 2. Plus yes, it's more prone to error. My previous android phone would freeze up because of the class 10. Moral of story: SanDisk has great speeds even on class 2
Sent from my HTC Amaze 4G using XDA App
Binary100100 said:
I had to send my 32gb class 10 Sandisk in to get replaced because of data corrpution. I agree though, Sandisk is great.
Click to expand...
Click to collapse
sandisk doesn't make class 10's or 8's, but It could be imported or something or maybe even a knockoff...the only way to make sure you have a sandisk is to call them and ask if they actually sell class 10, to my knoweldge the fastest microsd they sell is a class 6. can you point me to their webiste or somewhere, I am very interested. they do sell class 10 SD but not micro sd. I am very curious where you got this and how sandisk is actually replacing this...I have looked all over for a class 10 micro sd.
you can buy it at newegg: for 120 http://www.newegg.com/Product/Product.aspx?Item=N82E16820171571
or on their webiste for double the price lol: http://www.sandisk.com/products/mobile1-memory-products/sandisk-ultra-microsdxc-card
don't forget to increase your read ahead cache for the sd interface too. 2048K should be the optimal size.