ok, i have 2 hard drives that i bought enclosures for. both are giving me problems that are terrible first off, i have 1 hooked up to my imac. after i haven't used the hard drive for a while, i try to copy a file over to it, and it never finishes copying. if i unplug it, then it stops and i can use my machine again. the other one is even worse. when i do the same thing as above, it freezes the whole computer and i have to do a hard reboot. any ideas?