I have recreated this method based on this post to make it much easier for everyone to get this setup on their devices with complete details.
Confirmed Working With
1. Windows 7
2. Mac OS X 10.6 (Snow Leopard)
3. Mac OS X 10.7 (Lion)
4. Other OS versions possible just not yet confirmed/tested (only thing stopping is driver support)
How to Enable UMS Mode on your Verizon Galaxy S III
Benefits of UMS Mode
Confirmed Working With
1. Windows 7
2. Mac OS X 10.6 (Snow Leopard)
3. Mac OS X 10.7 (Lion)
4. Other OS versions possible just not yet confirmed/tested (only thing stopping is driver support)
How to Enable UMS Mode on your Verizon Galaxy S III
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1. Make sure you are currently rooted ***VERY IMPORTANT*** 2. Download and install the Samsung Official Verizon Galaxy S III USB Drivers - Link Here 3. Download and install GScript Lite from the Play Store onto your device - Link Here 4. Download the Verizon Galaxy S III UMS-MTP Switcher Scripts to your computer - Link Here (or attachment at bottom of OP) 5. Create a folder called "gscript" on the root of your internal storage (/sdcard partition) 6. Extract the two scripts from the zip file (from step #4) into that folder on your device - Screenshot Here 7. Open GScript Lite on your device 8. Press the Menu key on your device and select "Add script" 9. Press the "Load file" button and select "UMS Mode.sh", then press the "Save" button and the UMS Mode script will be added to the list 10. Press the Menu key on your device and select "Add script" again 11. Press the "Load file" button and select "MTP Mode.sh", then press the "Save" button and the MTP Mode script will be added to the list 12. Select the "UMS Mode" script from the list and allow Superuser for root access 13. The script will now run and do not worry if GScript Lite force closes at the end as this is perfectly normal 14. On your Windows 7 computer you will see it will try to install "SAMSUNG Mobile MTP Device" as one of the drivers and fail *this is normal* 15. Go into Device Manager on your computer, right click "SAMSUNG Mobile MTP Device" and select "Properties" 16. Click on the "Driver" tab and click the "Update Driver" button, a prompt will then come up 17. Select "Browse my computer for driver software", then select "Let me pick from a list of device drivers on my computer" on the next screen 18. Select "USB Mass Storage Device" as the new driver from that list and finish up that install 19. At the end you will see something like this on your computer - Screenshot Here 20. Windows will install final drivers automatically and a new "Disk drive" will show up on your computer, this is your external SD card on your device 21. If you want to return to MTP Mode, just select "MTP Mode" script from GScript Lite on your device and after it force closes you will be back to normal |
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USB Mass Storage (UMS) Mode used the old way of managing USB storage (like Galaxy S II and so on) before that changed to Media Transfer Protocol (MTP) Mode (aka. Device mode) with the Samsung Galaxy Nexus. The benefit of UMS Mode is that it will work with special devices that try to read your phone like a car radio head unit will now be able to read the songs, pictures, videos, etc through the USB port properly, as well as your TV (if it has USB support of course), among many other devices. Also it's a much more reliable method of transferring files on your computer since it's basically direct access to the SD Card as opposed working through a special protocol with MTP or PTP Mode. This mod will enable your SD Card to show up as a regular disk drive instead of a device on whatever you plug into with a USB port. Hope that helps explain it a bit without being too technical. For details on why Google decided to switch to MTP Mode see this article. |