How Can I Retrieve Files from my ipad?
I'm sorry to say, but it's gone... G.O.N.E.

Unless your PC/Mac has the files, its gone. Check to make sure you still have Contacts, Photos, Apps, Music, Videos on your iPad AND on your PC/Mac by going into the respective apps and by checking iTunes.

Also check to see if you have a backup of your iPad by following these steps:


Connect your device to the computer that has your backup.
Install the latest version of iTunes.
Choose File > Devices > Restore from Back up.


If it has the backup, well make sure that it hasn't got anything on it. If it does, sync that information over before restoring.

Good luck!