Help! My backup hardrive won't work

[duranduranie]

For months it's been acting weird. It stayed on for a day maybe and then just disappeared and I had to keep plugging it in and out but when I tried to open my files it was slow and sometimes crashed my computer. It kept saying "Indexing media" for some reason and messing my computer up.
Now it won't work at all and says this::

http://img196.imageshack.us/img196/792/picture1jbm.png


Does anyone know what went wrong, how or if I can fix it, and if there is any way to restore my files? I know very little about this stuff, so please be as simple as you can, thanks a lot.

ALSO; I don't have the OS install CD or any other kind of CD for my backup hardrive or Mac, anymore.

 

[BlueRevolution]

If it's a backup hard drive, I'm assuming there's nothing on there that you don't have a copy of elsewhere?

 

[Nilla]

Is it an external hard drive? Is it formated for your computer? If not go to Utilities>Disk Utility>*select drive*>Erase>*select drop down menu*>Mac OS Extended (journal)

 

[MacDawg]

At this point, the disk probably just needs to be reformatted as suggested above

If you have data that needs to be recovered, you can try Disk Warrior or Data Rescue II or File Salvage

Woof, Woof - Dawg