I bought a flash drive, new, off ebay. I wanted to use it to more easily transfer big files off my mini to my powerbook. It's a USB 2.0 drive, or so it says. I put it in the computer and immediately go to disk utility to erase the drive. It looks like it has been erased and "mac journaled" but then all my other applications start going whacky. Word especially. The desktop is behaving erratically and Word freezes, as does the desktop. I go into Activity Monitor and somehow all my disk utility files get erased off the computer. Including Activity Monitor. So I boot up from an external drive, thinking this flash drive has somehow infected my regular hdd. Everyting is fine (it's actually a clone of my original drive I made some months ago, running SL 10.6.8.) SO I just put the flash drive in my Powerbook to see if I could erase it, partition it, zero it out or what I could do with it. It will not be erased. It will not be partitioned. It will not be zero'ed out -- keeps giving a "will not unmount" error. I'm nervous about this. What could it be? I want to zero it out, make sure there is nothing on the drive, but it "won't unmount" so what's going on? Of course, in the Powerbook, I'm on 10.5.8 Leopard, but this shouldn't matter. How do I zero this thing out, make sure there is nothing on it, and use it like a normal USB flash drive? Really scared I put something on my Mini's regular start up drive, my main HDD with all my stuff on it.