knight_of_baawa :
Delete all the partitions and create one large partition. Then you can format it.
I found someone give details on how to do this but I got stuck with that person's instructions. May you please help? Here is what they said:
Place the hard drive in the case per the instructions, then go into the PC Control center and select Administrative Tools, Computer Management, then Storage -Disk Management. Now insert the USB connector of the hard drive case into you PC and look for the hard drive with a bunch of sectors colored black. Right click on each one and pick delete volume. You'll see the blue "Healthy Partition" increase in size. Keep doing this until you have only one large 500 gb partition. Click "simple format" and follow directions. Make sure you let Windows assign a drive letter or you won't be able to access the drive. When it's done, you should have a working back up drive. Enjoy!
Here is where I got stuck on:
"look for the hard drive with a bunch of sectors colored black. Right click on each one and pick delete volume. You'll see the blue "Healthy Partition" increase in size."
When i found mine at the bottom, it had a bunch of sectors colored blue and all said Healthy Partition. So I clicked on one of the Blue ones that had only 1.0 gb and picked delete volume. Now that 1 says Unallocated and it's colored blacked. I'm confused. can you please help. I will not touch it anymore. Thanks.