Ok, so I had one with me in my friend's apartment, it was accidentally unplugged from his MBP without being ejected. When I got back to my apartment and tried to use it again it wasn't appearing in finder and disk utility said the file system was messed up. I tried to repair it but it kept making my MBP so that I had to do a hard shutdown (tried 3x). Now OS X just says the disk cannot be read and bring me to the "erase disk" screen in disk utility. I'm hoping my data can be saved but how? Then I boot up again and my other external, my time machine drive, is no longer being recognized. It guess it might have been bad for it when I had to keep turning off the laptop but now it isn't responding/appearing at all. It doesn't appear in finder or even in disk utility. What can I do to make Leopard recognize this disk again as well? EDIT: After rebooting AGAIN and reconnecting it the time machine drive is being recognized again, but the larger capacity, more important drive is still not working.