[quote name='boneless']I just transferred about 500GB of movies which took hours and that was with both hard drives in the same computer. Although this would be the fastest method, you didn't want to open your towers so forget about it. For 30GB, i would just use an external drive if you won't use it very much or want to return it to Bestbuy or wherever. The trouble I have with returning is not taking advantage of the policy, but you need to wipe the drive cleanly if there's anything remotely personal on it to be safe. It doesn't sound like you know how to do this either. Flash drives in my experience are much slower.
My opinion is to buy the external and keep it. It never hurts to have a backup of your media. Also don't over-buy the GB size since prices always come down.[/QUOTE]
If privacy is a concern then use
CCleaner's erasing tool. It's very easy to use.
If you want to go all out, then encrypt the data in a
TrueCrypt container first, transfer it to the external drive. Then erase with CC cleaner. Heck you can leave the container there if you want, with a good AES password no one (within the most probable customer base of Walmart, unless the NSA shops there) will be able to break into it.
What kind of data are you transferring anyway? I doubt the next person who buys it will even care to use some data recovery tool just to get at the deleted pictures of your cat.
I mean Is that what you guys do when you buy a refurbished hard drive?