Ok the problem is the formatting. Number one what you need to do is take out what is in your WD transfer it to which computer can recognize it. Once the WD is empty you need to format that. I know how to do it on MAC but with windows
I have not tried. With WD they do have a website and it's free when you call them. They will guide you how to format that on the phone. Once you have done the proper format you can use the WD to any computer. ANY. try to check the website to get the number for technical support.
Or you can format that onto a mac computer. here is how you do it. If using mac to format:
Click on Macintosh HD
Click on Application
Double click on Disk Utility
Click on your WD e.g 320.07 GB WD etc.
Click on Partition Tab.
Choose Partition 1 on the drop down below
You can rename your WD to anything
Click on Format option and Choose MS-DOS (FAT) not big woman ok.
click option below and Tick Master Booth Record
Then Click Apply:
You will notice on the desktop the WD will change name. That indicates that the format is done and you can use your WD to any computer... hope this help.