Hi i have a mac book pro with OS X version 10.5.8. i recently bought a toshiba 320 GB USB 2.0 external hard drive - which on the box said compatible with Mac and leopard. I plugged it in and all it has is .exe and windows set up files that dont run on my mac, and i try to drag things into the hard drive and it tells me TOSHIBA EXT cannot be modified. PLease help asap