[APP][ROOT] SG USB Mass Storage Enabler

MohammadAG · May 27, 2013

SG USB Mass Storage Enabler allows you to export your microSD card over USB as a Mass Storage device. It will never be able to export the internal storage on the device.

I originally made this app for myself for the SGS3, as I needed some more flexibility in mounting/unmounting than Easy UMS offered. However, I backed out from releasing it as I thought it wasn't a nice gesture towards Easy UMS's dev.

Features:

Allows you to use your microSD card as a USB Mass Storage device.
Shortcuts on your homescreen to easily enable/disable USB Mass Storage mode.
Warns the user if they try to disable Mass Storage mode without unmounting/ejecting on the PC side.
Auto-detect files needed for wider compatibility.
Auto-switch to Mass Storage mode when a USB cable is connected and back to MTP when it's disconnected (pro add-on).

Tested working on:
Sony Xperia Z1
Samsung Galaxy Note II (GT-N7100)
Samsung Galaxy SIII (GT-I9300)
Samsung Grand Duos (GT-I9082) - Thanks to wan Mohd in Play Store reviews.
Samsung Galaxy S4 (GT-I9500) - Thanks to taiseer999 in the replies below.
Samsung Galaxy S4 (GT-I9505) - Thanks to Solomon Chow in Play Store reviews.
Samsung Galaxy S4 (SGH-I337) - Thanks to Delyan Georgiev in Play Store reviews.

Screenshots:

Download:
Get it from the Play Store!
2.3.1 APK: http://mohammadag.xceleo.org/public/Android/SGUSBMassStorageEnabler_2.3.1.apk

Support development:
Like the app? Please consider buying the in app pro add-on Thank you

clark44 · May 27, 2013

Works on the Sprint Samsung Galaxy S4

scary_master · May 27, 2013

Dude, your app is awesome. BIG THX :good:

(i9505)

Tom-Helge · May 27, 2013

Could you get the app to mount the internal memory of the Galaxy S4 to?

Or is that kinda hard to fix atm according to the Linux filesystem as you described in the app?

I'm asking since it's normal that both the internal and memory card gets mounted when you mount the device.

MohammadAG · May 27, 2013

Tom-Helge said:
Could you get the app to mount the internal memory of the Galaxy S4 to?

Or is that kinda hard to fix atm according to the Linux filesystem as you described in the app?

I'm asking since it's normal that both the internal and memory card gets mounted when you mount the device.

They way USB mass storage works is by exporting the whole device block over USB. It's the same as connecting the microSD directly to the PC.

S3 onwards, /sdcard is not a partition anymore, it's faked using fuse and is actually located in /data/media. So to export it you'd need to unmount /data. I've never tried that but I'm guessing it'd cause some serious problems if the device is online, and it'll cause some data loss since I'm sure you'd need to force the unmount.

And even after succeeding with the above, you'll be greeted with a Windows error since it can't read ext3/4, so it's useless for most users.

TL;DR it can't be "fixed". It's a limitation in both UMS and how you can't simultaneously mount a partition on two devices without causing some damage.

Sent from my GT-N7100 using xda app-developers app

andygolf · May 27, 2013

works great on galaxy s4 I9505

Tom-Helge · May 27, 2013

MohammadAG said:
They way USB mass storage works is by exporting the whole device block over USB. It's the same as connecting the microSD directly to the PC.

S3 onwards, /sdcard is not a partition anymore, it's faked using fuse and is actually located in /data/media. So to export it you'd need to unmount /data. I've never tried that but I'm guessing it'd cause some serious problems if the device is online, and it'll cause some data loss since I'm sure you'd need to force the unmount.

And even after succeeding with the above, you'll be greeted with a Windows error since it can't read ext3/4, so it's useless for most users.

TL;DR it can't be "fixed". It's a limitation in both UMS and how you can't simultaneously mount a partition on two devices without causing some damage.

Sent from my GT-N7100 using xda app-developers app

Ok, thank you for your quick answer :good:

taiseer999 · May 28, 2013

Works fine on galaxy S4 I9500

JayceOoi · May 28, 2013

taiseer999 said:
Works fine on galaxy S4 I9500

+1 Thanks. :good:

bontistic · May 29, 2013

@MohammadAG

I'm using the Android File Transfer desktop app on a Mac now. Would this have any conflicts that you'd know of? Thanks!

eah7271 · May 29, 2013

Not working on Verizon Galaxy S4 SCH-I545. Any way to make this happen?

MohammadAG · May 29, 2013

bontistic said:
@MohammadAG

I'm using the Android File Transfer desktop app on a Mac now. Would this have any conflicts that you'd know of? Thanks!

This should be the same as plugging in a normal flash drive. So no, there shouldn't be any conflicts.

eah7271 said:
Not working on Verizon Galaxy S4 SCH-I545. Any way to make this happen?

In a terminal emulator or using adb, type the command

Code:

 find /sys -name lun*

and post the output.

Sent from my GT-N7100 using xda app-developers app

eah7271 · May 30, 2013

MohammadAG said:
This should be the same as plugging in a normal flash drive. So no, there shouldn't be any conflicts.

In a terminal emulator or using adb, type the command

Code:

find /sys -name lun*

and post the output.

Sent from my GT-N7100 using xda app-developers app

sh-4.2$ find /sys -name lun*
/sys/devices/virtual/android_usb/android0/f_mass_storage/lun
/sys/devices/platform/msm_hsusb/gadget/lun0
sh-4.2$

telekumar · May 30, 2013

exactly what i was looking for, thanks..

MohammadAG · May 30, 2013

eah7271 said:
sh-4.2$ find /sys -name lun*
/sys/devices/virtual/android_usb/android0/f_mass_storage/lun
/sys/devices/platform/msm_hsusb/gadget/lun0
sh-4.2$

I've added support for it, v1.3 should be in the Play Store an hour from now..
In the meantime you could use http://mohammadag.xceleo.org/public/Android/SamsungUSBMassStorageEnabler_1.3.apk

dtm4lifebaby · May 30, 2013

I'm still unable to get your app working with Verizon S4. When I enable the feature, my phone launches the verizon installer on the PC for about 5 seconds, then goes back to MTP

eah7271 · May 30, 2013

MohammadAG said:
I've added support for it, v1.3 should be in the Play Store an hour from now..
In the meantime you could use

I also tested and it is not working.

Click to expand...

Click to collapse

Svid · May 30, 2013

So far so good
shukran habibi (thanks buddy)

Finrod Paradox · May 31, 2013

Majesty00 · May 31, 2013

Hello,

No surprise here, but it doesn't seem to work with a Galaxy Nexus (I9250). Too bad, I hate MTP!

Anyway, thanks!

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