Mass storage mode - Galaxy S III Q&A, Help & Troubleshooting

Hi guys, which Rom supports the usb mass storage mode? I know, it s a option to enable the external card with easy ums but I want the normal way
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GS3 doesn't allow that. You just have to use easy ums.
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Edit.

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Easy ums only works for external memory.
So, any mod for internal massive storage?
Thanks

ZaKaTRoN said:
So, any mod for internal massive storage?
Thanks
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NO!
The internal storage is one big lump of memory with ONE (1) partition, i.e. /data. The internal "sdcard" has a mountpoint at /data/media but it's still only one partition and there's no way to unmount the /data partition and then mount it for mass storage. That's why we have MTP.

Theshawty said:
NO!
The internal storage is one big lump of memory with ONE (1) partition, i.e. /data. The internal "sdcard" has a mountpoint at /data/media but it's still only one partition and there's no way to unmount the /data partition and then mount it for mass storage. That's why we have MTP.
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Thanks for that. Didn't know that was the reason behind it. :thumbup:
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Related

How does SDCard work?

Waiting for my AT&T model and had a question, how does the 16GB internal storage get presented at file system level? Is it mounted as /sdcard or something else? If so what does the external SD get mounted as? Trying to decide if I need an SDcard or not. 16GB is enough for me but concerned about app compatibility depending on how its setup.
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Mounts as sdcard external card mounts as ext sdcard on stock firmware apps cannot be installed to ext sdcard.
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Easy one. Where is my internal storage on CM9?

On all other roms I used it stored my internal SD card in the 'mnt/sdcard' and the external would be in the 'mnt/sdcard/external_sd'...
This ROM stores the external sdcard in the opposite manner (mnt/sdcard) which makes more sense but I can't find out where the internal sdcard is stored.
Thanks in advance.
ROM is seraphim mesosphere...or something like that lol
/emmc
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Read this
http://yagyagaire.blogspot.com/2012/05/moving-apps-to-sd-ext-in-android-40-os.html#.T-Xe_RfUN-Y

[Q] How to swap internal & external storage?

Does anyone know how to swap the internal storage with the sd card? The fstab looks funky.
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Mister_Mxyzptlk said:
Does anyone know how to swap the internal storage with the sd card? The fstab looks funky.
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what do you mean by swap the internal storage with the external? dont you just normally use both internal and external together?
FOr what reasons? For apps to be moved/installed in the external SD?
Answer is at the moment Apps2SD doesn't work YET in s3
No. I mean to literally swap their mount directories. I've done this before on my Note. I edited my vold.fstab and with a little help got my internal storage mounted to /sdcard/ExternalSD and my 64GB SD card mounted to /sdcard. That's what I want to do here.
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Anyone?
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For what reasons do you want to do this?
Look in siyah kernel thread.he changed the vold.fstab mounted in adb.ask him about the swap.
zodiaxe66 said:
Look in siyah kernel thread.he changed the vold.fstab mounted in adb.ask him about the swap.
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Thank you so much. And to answer the questions, I want to do this so my internal storage can be as big as the SD card I'm using. For example, I have the storage swapped on my n7000 so my 64GB SD card is read as internal storage and my 16GB internal storage is read as an external SD card.
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bordikun said:
For what reasons do you want to do this?
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I would like to do the same. i have done this switch on my note and it works flawlessly. I want to do this because I am a hardcore gamer and 16gb is nowhere near enough space to store all my game data, but my 64gb sd card is.
Mister_Mxyzptlk said:
Thank you so much. And to answer the questions, I want to do this so my internal storage can be as big as the SD card I'm using. For example, I have the storage swapped on my n7000 so my 64GB SD card is read as internal storage and my 16GB internal storage is read as an external SD card.
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Never thought of it that way hehe. But I have a question about the setup: Have you ever had issues where your SD card randomly unmounted itself? If so, what happened to the system? Were you still able to run it or did it freeze or anything else?
Thanks
Not even once and I have had it set this way on my note for months through several different roms
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The internal SDcard is not a real partition but a userspace mount (fuser)
It's configured in the file /init.smdk4x12.rc with the exact definition:
Code:
service sdcard /system/bin/sdcard /data/media 1023 1023
I don't see the daemon getting any kind of configuration as to the target directory. Either it's hardcoded or it uses /system/etc/vold.conf definition volume_sdcard the mount_point value.
You can't use Easy UMS anymore though since it will unmount the external SD.
Just using the APK Directory Bind will work fine though to simulate folders on the external SDcard as being on the internal one.
You can swap over the Internal SD with your external SD so you could have a 64GB phone with a 16GB ext card (assuming your phone is a 16GB one) - take a look at ExtSd2InternalSd v4|Increase your data storage

Difference between "Device memory" and "USB storage".

Hello everyone,
Whats is the difference between device memory and USB storage?
As far as i see all the apps installed on the Device memory and all the photos and other files are located on the USB storage.
I had "insufficient storage available" problem which I fixed by uninstalling apps and that cleared some space on "Device memory" which has only p1.97GB of space, and on the other hand "USB storage" has 11.50GB of sace.
Is there a way to install apps on the USB storage?
I tried apps2SD but i see its only for external SD card.
Thanks in advance.
Device memory is for your apps and system etc. Usb memory is the mass storage for all your pics and music and for whatever else your apps might need space for.
They are basically partitions and as far as I know, there is no (safe) way to change them.
Btw apps2sd is for moving apply data to an external memory card.
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Device Memory is referring to the ~2GB system storage partition on the device, which is part of the total 16GB of internal storage. Another ~12GB is taken up by what's being referred to as USB Storage, and refers to another partition of the 16GB of internal storage. If you have an SD card, that'll be referred to as the External SD Card.
Your system storage ("Device Memory") is located at root /
USB Storage is located at /sdcard
If you have an SD card in your device, it'll be located at /emmc/
Please do note though that these locations may/probably do change between ROMs, and I only know for certain that these correct within CyanogenMod 9.
screamworks
screamworks said:
Device Memory is referring to the ~2GB system storage partition on the device, which is part of the total 16GB of internal storage. Another ~12GB is taken up by what's being referred to as USB Storage, and refers to another partition of the 16GB of internal storage. If you have an SD card, that'll be referred to as the External SD Card.
Your system storage ("Device Memory") is located at root /
USB Storage is located at /sdcard
If you have an SD card in your device, it'll be located at /emmc/
Please do note though that these locations may/probably do change between ROMs, and I only know for certain that these correct within CyanogenMod 9.
screamworks
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Just FYI, external SD at /emmc is for AOSP/AOKP ROMs.
For Sammy stock ROMs, external SD will be at /mnt/sdcard/external_sd. (This is Samsung's brilliance. Not sure why they did this...)
ctomgee said:
Just FYI, external SD at /emmc is for AOSP/AOKP ROMs.
For Sammy stock ROMs, external SD will be at /mnt/sdcard/external_sd. (This is Samsung's brilliance. Not sure why they did this...)
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Ah, thanks for that! If I'd given it more thought, I probably would have figured that out. But alas, brain is obviously not functioning. Cheers.
screamworks
Rizur said:
Device memory is for your apps and system etc. Usb memory is the mass storage for all your pics and music and for whatever else your apps might need space for.
They are basically partitions and as far as I know, there is no (safe) way to change them.
Btw apps2sd is for moving apply data to an external memory card.
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Click to collapse
Why is it that when I take the option to move some apps that can be moved from device storage to USB storage I don't see the used space going any higher? please check out this image for an example. the figures don't seem to add up with the used figure against the apps with the ticks that have been moved to USB storage.
I still can't find an answer to issue raised here. How can I use USB storage instead of device memory?

[Q] my internal memory does not mount

No idea why it doesn't mount on my phone, but mounts along with my SD card when I connect it to a pc
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andrix10 said:
No idea why it doesn't mount on my phone, but mounts along with my SD card when I connect it to a pc
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Try formatting it from your PC in FAT32 (not NTFS or exFAT) or from your Recovery.
Are you sure it's not mounting? Most CM-based ROM's, including Infection, do not use the internal storage volume, so it will appear empty if you did a complete wipe before installing.

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