Okay so I bought my itouch from another person and it has tons of applications on it. I opened my Itunes and I don't know how to transfer the existing applications on my itunes. I clicked syncing and itunes threatened me to erase all my files so I quickly clicked cancel. About browsing google, I found out that the solution is this Transfer Purchases. I tried ticking the transfer purchases and I AUTHORIZED MY COMPUTER and it shows that it is transferring applications but for only just a second then the apple logo will be there again as if nothing happened.