If you don't have a problem with reformatting it you can reformat with Disk Utility by:
1. Open Disk utility.
2. Clicking on the name of the Hard Drive in the left hand column.
3. Clicking on Erase or Partition (See below for more info about Partition)
4. Under the Erase tab you can choose the Volume Format: Mac OS Extended (Journaled), Type in the
name that you want it to have (Ex: Bobs Drive), and click Erase.
I usually format all new hard drives that I hook up to my Mac Mini.
Something else you could do, if you want to keep the data that is already on the hard drive is:
1. Back up all the data that is currently on the hard drive on another computer.
2. Open Disk utility.
3. Clicking on the name of the Hard Drive in the left hand column.
4. And instead of clicking the erase tab click on partition.
5. Under the partition tab you can pull down the Volume Scheme Menu and choose 2 partitions.
6. Choose the size that you want the mac partition to be and choose to leave the rest as free space.
7. After it formats it will more then likely pick up on 2 partitions when you plug it in the mac. You'lll
be able to use the Mac Partition for your music, files, etc. And then format the free space on a PC
so that the PC will pick up the free space. (The Mac should pick up on both formats even after
the PC format.)
I actually use the second suggestion myself with my 250 gig external LaCie Hard Drive. I have 230 gigs allocated for my itunes, files, etc., and the other 10 gig or so for my PC at work & for my wife's laptop. Works like a charm for me. If you have any questions about anything that I've mentioned feel free to ask! 🙂
Hope one of these work for you! GL!