Galaxy S III

How to Enable USB Mass Storage Option in Samsung Galaxy S3 – Tutorial

Galaxy S3 Green LogoWith Jellybean 4.1 nearing its roll out on the latest SAMSUNG Galaxy S III GT I9300 device, it seems like most of the users are disappointed with one of the feature which doesn’t find place in the device. Yes you have caught it right, it’s the USB Mass Storage Mode (UMS). So, to keep things simple, we will be guiding you in the due course of this article on how you can easily infuse this option in your next generation Galaxy S III. In place of UMS option, users will have to make use of MTP which is also called as Media Transfer Protocol.

There are their own advantages of both these modes, but then for most of the users it’s like compatibility versus the preference. One of the major drawbacks is that not all the operating systems are compatible with the MTP and without the third party tools, things can only get messed up. All thanks to the XDA developer which has come up with this standalone application which can be applied to all the phones of Samsung Galaxy S3. So, for all those who wanted to get rid of the instructions of MTP, can proceed to follow the instructions mentioned in this tutorial.

Warranty Information: Warranty will be intact since it’s not a compulsion that the device has to be rooted.

Though there is a very less probability that the data in the device may get lost. So, it’s highly recommended to back up all the data present in your device. Ensure that all the data in the device is backed up only with the help of below steps. Don’t use KIES to back up the data.

SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log –Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names

So, let’s head to the procedure below on how to infuse in the option of USB Mass Storage Mode (UMS) in your Samsung Galaxy S III GT I9300 smartphone.

Procedure to Enable USB Mass Storage Mode (UMS) in Samsung Galaxy S3:

  • Download the USB Mass Storage (UMS) APK file from here to your computer and connect your phone to computer with the help of USB cable to copy this APK file in your device.


  • Disconnect and navigate to the APK file which you placed in the device to open and install the same. Follow all the on screen instructions so as to install this application in your device.

  • Once it’s installed successfully, open the same and select any option as mentioned in the screen capture below.

Do let us know in the comments section just in case if you face any issues as we will try our level best to sort out the same. So there you go, you have successfully installed the USB Mass Storage Mode (UMS) capability in Samsung Galaxy S3 with the help of an all new application.



  1. king

    May 13, 2014 at 3:25 pm

    Where is the apk…I can’t find it here

    • Pradeep Neela

      May 17, 2014 at 12:49 pm

      which apk you want?

  2. Ron

    March 28, 2014 at 3:08 pm

    Ok I figured it out. The problem seems to be the wire you’re using. you can’t just use any wire that fits you MUST use the wire that came with your phones charger! Hope that helps!

  3. Keith

    December 20, 2013 at 2:48 pm

    Wow, what a mess.

    First of all, the APK you want us to use only works on rooted phones. You claim this procedure works on unrooted phones. Apparently you are wrong, or something is missing.

    Secondly, for people who can’t connect their phone to the PC, which is why they want to activate Mass Storage, they can’t transfer any files from the PC to the phone.

    If someone knows how to make this work on an UNROOTED phone, please let us know.

  4. Pedantic_Douchebag

    October 31, 2013 at 4:15 am

    I had mass storage working on my phone out of the box (it’s a GT-I9300 made for the French market, bought unlocked on eBay in the US). After 4 weeks, suddenly it appeared not as two removable drives (1 for the phone memory and 1 for the SD card) in the Windows 7 “Computer” window, but instead as “GT-I9300 Portable Media Player” which at first had no contents. Alarmed, I wound up here, where I ran up against the same chicken/egg problem, but figured out the way around it: unmount & remove my SD card, put it in my computer’s SD card slot, copy the *.apk file to it, then put it back into my phone. However, just after unmounting my card (done via a switch in the Storage menu settings), I had an intuition to re-mount it and then check Windows Explorer again. Sure enough, the GT-I9300 Portable Media Player now had contents, my two drives, the phone and the SD card, with access to all the files on both. In case this helps someone, try it, and if not, go ahead and run the .apk file once you’ve tx’d to your SD card. Good luck!

  5. Nadeem

    October 29, 2013 at 9:32 pm

    I found a better way to enable usb storage on note 2, s3 and s4 right here

  6. Dee

    June 5, 2013 at 2:03 am

    Terribly confused. I feel so inadequate with my new galaxy 3. I have copied the file several times and I can see that it has downloaded to the phone but how do I get to the Mass Storage??? How do I get the file to open in apk. format? What is really going on?? Please help a technologically challenged person. Thanks

  7. alansan2013

    May 16, 2013 at 8:55 pm

    I have the same problem with my gt-i9105p ics4.1.2 : no ums option !!!
    is your *.apk compatible with my gt-i9105p or only with a S3 ?!!

    best regards

  8. Jenson Jacobs

    April 18, 2013 at 10:08 am

    The instructions say to “Download the USB Mass Storage (UMS) APK file to your computer” but then the instructions say “connect your phone to computer with the help of USB cable to copy this APK file in your device.”. Hmmm… if we can’t access the phone as a USB device, how are we supposed to copy the APK file from our laptop to the phone? Doesn’t make sense. Chicken and egg problem.

    • sid

      October 19, 2013 at 4:31 am

      Ditto…. hoping to find an answer I continue reading…..

    • yusi usiy

      November 27, 2013 at 9:07 pm

      It’s really easy download the apk file to your computer, after that go downloads of your computer and you will see the apk file, now connect your phone into the computer and open the download folder on your phone…now go to the download folder of the computer find the apk file transfer it to your download folder on your phone and then disconnect your phone, after that go open your phone and go to the download folder your will see the apk file, double click to instal it and then Google will ask you if you want to accept the download from unknown sources click yes and it will start downloading, when it’s done you will see it. Hope this helps….

  9. Desparate

    April 6, 2013 at 10:54 pm

    Hi,I have done everything i.e. rooted, install BusyBox, SGS3 Easy UMS, Supersu, undelete app. But no luck of USB option to recover my photos. When i use undelete app, it tells me about the FAT32 file system. Please help I really need my photos.
    Waiting for reply

  10. Mad SA

    March 31, 2013 at 2:33 pm

    I can’t help but be a little rude: what the f**** is the right answer for this problem now?
    I’m done hearing anything else… I wanna hear the solution, so angry.

  11. art

    March 28, 2013 at 8:37 pm

    SG3- ROOTED,SU,BB, & UMS installed… Still crap! Would a new OS solve issue??
    I should not have to fiddle around to make work!! what junk.

  12. Ethan

    February 10, 2013 at 9:37 am

    Galaxy s III out of the box, just want to put some tunes on it and I get this crap. The iPhone was a hassle too cos you have to authorize a specific computer. I worked around that using the sync from playlist option but on the Galaxy S III (which is meant to be the biggest baddest mofo out there) I have to go to nerd forums and download shit. Fuck this!

  13. darin

    November 8, 2012 at 11:34 am

    so… everyone (including myself) is getting the same damn error. I dont want to root my phone. is there another option? is there a fix in the works for this?

  14. Kid

    November 2, 2012 at 8:08 pm

    I am not a tech geek. I don’t “root” phones, whatever that is. I simply deletd photos that I need to recover. All recovery tools require UMS mode, and I have downloaded the apk and tried enabling UMS but I get the same error message every time:

    ***Could not get root privilages, external SD card is being accessed or other error. I/O Exception***

    Does anyone have an answer on how to fix this please?? THANKS!!!!!!!

    • Pradeep Neela

      November 5, 2012 at 7:39 pm

      as of now there are no tools to recover the deleted things unfortunately

    • Kefayat

      November 28, 2012 at 3:18 am

      Ive got the exact same problem as you..have you managed to find any solution?

  15. Vikas Bhatt

    October 28, 2012 at 8:33 pm

    Requires Root access!

  16. AndrewR NZ

    October 23, 2012 at 4:38 am

    Will this work on the Samsung Galaxy Note GT-N7000 ? Mine is rooted.

  17. Robert

    October 13, 2012 at 5:34 pm

    DONT DOWNLOAD ITSA FAKE! (need root always for this type of commands)
    dont be fooled there is no app or update or anything available to do this whitout rooting!
    BEWARE! im not sure what this software does do….but it aint ums!

  18. Brad

    October 11, 2012 at 3:52 am

    I’m getting the same error as everyone else “Could not get root privileges, external SD card is being accessed or other error. I/O Exception”. I hope this is fixed soon. I do NOT want to root my phone.

  19. aj

    October 10, 2012 at 7:25 pm

    Whats the point of this feedback no-one is helping. I’m trying to come over from the iPhone, got a nice SGS3 but what a POS this android nonsense is. My 3s knocks spots off android. Nothing works and nobody helps.
    Looks like i’m turning into a fan-boy…..for the iPhone.

    • Anti-fan

      March 8, 2013 at 6:55 pm

      So you changed from a closed Apple environment to an open Android environment and find that learning some mildly technical stuff is too hard for you? Well, boo-f’n-hoo. Maybe you should stick with Apple since “everything works” as you cannot do anything/run anything that isn’t sanctioned by Apple Inc. That is, unless you jailbreak your phone which would require at least some (little) techincal competence.

      You know, you could just do this the Apple way and submit to the fact that you can’t use it as USB mass storage and go on with your life convincing yourself that it wasn’t what you really needed anyway. Or then you can bite your lip and actually try to learn to do some mildly tech.stuff without starting to bitch once the first (easily solvable) problem arises.

      I hate fanboys.

  20. Alan James

    October 9, 2012 at 3:01 am

    Turns out that you do need root access.

  21. Lerato

    October 4, 2012 at 3:45 pm

    I also have an S3 and get the smae error: “Could not get root privilages, external SD card is being accessed or other error. I/O Exception”

  22. Dan

    October 2, 2012 at 12:48 pm

    ohh thank goodness someone else who doesnt know how to copy the file to the SG3 , i dont know either ???

  23. Geoff Bryant

    October 2, 2012 at 8:56 am

    I had the USB storage problem with my Galaxy Note using Windows 7 but I’ve been using the Windows 8 Release Preview for the last few days and USB mass storage is once again available just like it used to be before Android 4.0.4. Great, I can once again update my website’s home page without having to get out of bed!

  24. alan

    September 20, 2012 at 10:15 pm

    Can someone tell me if root is needed?

    If it’s required will kies still work? Will it break future updates on the phone?


  25. aghaaijaz

    September 20, 2012 at 8:17 am

    Please help with me for ums

  26. Hossein

    September 16, 2012 at 12:33 am

    It needed root so i rooted my phone but it doesn’t work even now it says “could not recognize mounted external storage (maybe busybox not installed?)”

    • Kefayat

      November 28, 2012 at 3:16 am

      Having the same problem here, any suggestions?

      • Pradeep Neela

        February 16, 2013 at 3:57 pm

        which problem?

  27. Random

    September 13, 2012 at 6:11 pm

    So you seriously say to enable USB mass storage on the device first you copy a file to the device via USB mass storage? WTF

  28. Cse

    August 25, 2012 at 1:39 am

    When I press UMS mode it seems to be working (I get the confirming message) but nothing changes. I can still see my external SD card in the device, it doesn’t mount as a USB mass storage.
    Does anyone know what to do? Thanks!

  29. Trent

    August 12, 2012 at 2:01 pm

    I also have a galaxy s3 just out of the box and when I press “UMS Mode” I get “Could not get root privilages, external SD card is being accessed or other error. I/O Exception”

  30. Kumarentran

    July 26, 2012 at 3:18 pm

    requires root for the internal storage…….. How now?>

  31. xoj_21

    July 18, 2012 at 11:35 am

    this is for external, how i get internal memory?

  32. Bizzle

    July 16, 2012 at 8:07 am

    When selecting any of the options (UMS, Mount Card, or MTP), it says “could not get root privileges”.  In this article it says that no rooting is needed, but it appears there might be.  Is this just because I have not updated with the ICS 4.0.4 firmware? 

  33. Ryan

    July 15, 2012 at 4:18 am

    I have a galaxy s3 just out of the box and when I press “UMS Mode” I get “Could not get root privilages, external SD card is being accessed or other error. I/O Exception”

  34. Tarek S

    July 13, 2012 at 9:02 pm

    My S3  still requires me to root the phone when I’m using the software to mount the micro SD card :

  35. Vaibhav Mhatre

    July 13, 2012 at 1:32 pm

    Thanks for the tutorial 
    they always best…

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