This is double of what Dropbox is giving HTC One series owners, however just like HTC, the free storage will only be valid for two years. If you already have Dropbox installed on your Android device, you must Clear data, Force close and finally uninstall it from Settings > Applications > Manage Applications > Dropbox.

Installation using ClockWorkMod:

Add apps to your internal sdcard and flash with CWM.

Steps

1.) Uninstall any Dropbox on your device.
2.) Download and install this app.
3.) Login, and after about 10-30 mins you’ll get an email that says you’ve got   48GB of space more

If you want to add manually, here’s the way,

1. Use root explorer or similar file manager apps.

2. Add the files below,

system/app/Dropbox.apk
system/app/DropboxOOBE.apk
system/framework/com.dropboxpartner.jar

3. Give permission; rw- r– r– chmod 644 filename

4. Reboot.

That’s it.

Code:

http://bit.ly/KBuq3i

Download Instructions:

http://www.mediafire.com/?sbcbo8kmldmanwd 

Mirrors:

http://www.mediafire.com/?sbcbo8kmldmanwd 
or
https://hotfile.com/dl/157101366/c4e…Dbox.zip.html 
or
http://www.directmirror.com/files/60HA419T

The bonus free space is going to last for 2 years from the day of activation. Once activated, you can remove all clients (PC and Smartphone) and you will see that the storage is bound to the account. And of course, you can install a new Rom on your phone without the need to do it again. Now throw your phone into the ocean and visit the next internet-cafe and you will see, that you still have 50GB of storage because you activated it with the files that were delivered with the Galaxy SIII.