I currently have an iPad 3, is this still possible to do? I'd personally like to transfer music, videos, and photos via USB or SD card. I've never done it before, but I remember it was possible with previous generations.
I think the people here are waiting for you to try it out and report back to us.
Also this is the IOS hack section more about jailbreaking this is a accessory not a hack.iPhone accessory's is where this should be posted.
I hope this thread might help you:
http://www.ipadforums.net/ipad-hacking/71951-using-external-storage-devices-ipad.html
Look at post #5, guy's name richfong test with ipad 3 and he said work fine
you would need to be jb.