Problem with external HD

You should go to Applications > Utilities > Disk Utility and see if your disk shows up there. Then try to verify/repair it.

You need to unmount/eject the drive before you unplug it. To do that, drag the drive icon from your desktop to your trash can.

ggjstudios said:

You need to unmount/eject the drive before you unplug it. To do that, drag the drive icon from your desktop to your trash can.

Click to expand...

Or click the Eject Icon next to the drive on the left side of the Finder window.

petersonwork said:

When I went to Disk Utility it did not show up there so I could not repair or whatever.

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Disconnect from computer, turn off the drive completely, then turn it back on and plug it back in? It gives absolutely no messages anymore?

Also, check system.log in Console (also in the utilities folder) to see if there are any errors...

I had a problem like that too, well not exactly like that but similar. It might have something to do with formatting issues. . . Mac tends to do things like that. . . like it all of a sudden realizes after using it for a while, that "oh, this drive isn't formatted correctly so I'm going to stop allowing it to work." If there is a PC around try plugging it into that, to see if it works on a PC, that will let you know if the External is damaged or the Mac.

Disk Warrior might be able to let you access your files
http://www.alsoft.com/DiskWarrior/index.html