i just purchased a seagate freeagent goflex ultra-portable 1TB external drive which claims USB 3.0 plug and play, and in smaller print below "also works with USB 2.0." i plugged it in, it mounted, i went to erase the drive using disk utility and after about 30 seconds threw up an error saying file system formatter failed, and now the drive won't mount. being hopeful i figured it was a faulty drive, returned it and got the same drive, same thing happened. looking around on the webs there's too much mixed information going on for me to draw any sort of conclusion about it's compatibility. the thing i'm having trouble with is if it claims USB 2.0 compatibility, then it should format normally...?