Problem with External Hard Drive - Really Need Help
 

Okay, so, I'm an idiot. While I'm good with computers in general, there are some territories I don't know too much about, and thus rely on my techie friends. Recently, one of those friends offered to let me borrow a rather large and expensive program. He was going to transfer said program to my external hard drive (a 1TB MyBook), but when he tried, it apparently wouldn't work because my drive wasn't properly formatted for the Mac, which is weird since I have a Macbook Pro.

Anywho, that's neither here nor there. He gave me some instructions, which consisted of exporting the files on the drive back onto my computer, go to Disk Utility, to the MyBook, and to Erase. He set it all up so I could do it after exporting the files, but I had to restart my computer at one point and lost the settings he applied. So, I guessed the Volume Format and selected "Mac OS Extended". There was an error, and now my computer doesn't recognize the MyBook.

So, I obviously did something wrong, does anyone know how to correct it? I hesitate to ask my friend.

Are both machines macs?

Does the hard drive show up at all in disc utility (in the left-hand side), or will it just not mount on your MacBook desktop when it is attached?

Typically you would select "Mac OS Extended (Journaled)" to make it a bootable (startup) volume or "Mac OS Extended" if you didn't need it to be bootable.

Both computers mentioned are Macs.

The hard drive won't connect at all now, it showed up perfectly before.

Stupid question - after you shut down everything - the Mac, the MyBook, everything - and plug it back in, do you see the device in Disk Utility, on the left? If not, then it's quite possible either the drive itself, or the cable, is bad. If it does, then you will need to Erase it again. I know the Mac will play nicely with the 1TB MyBook.

There's not a clicking or anything coming from the MyBook, is there? Do you have another system you plug the drive into?