I don't really know the best site for posting this, but i thought i'd try my luck here. I have just got a new external hard disk, the Seagate expansion, and i am trying to format it to work on my mac. I was told that i had to erase the disk and format it to OS X Extended (Journal) with the Disk utility program. However, disk utility wont allow me to erase it. It says: Erase-process failed. So i am currently stuck with a hard disk that doesn't work. Any help is appreciated!