My seagate free Agent exturnal hard drive

That is more than likely the issue right there Carrie- The FreeAgent Pro has not been formatted to be Mac readable.

So here is the process for properly formatting a Seagate Free Agent HD:

Reformatting Seagate Free Agent HD to work on Macs

This is one of the better and more simple guides I could provide you for this Seagate product.

Let me know if this proves of good reference for you.

Regards,

-Mactechtrainer

Hi, Sorry to hear you are having problems,
When you open your hard drive, is it locked ? Do you see a pencil with a line through it in the bottom left had corner ?
It could be that the drive has inproper permissions....
So, try this, click on the Hard drive icon (Please be sure it is the external drive, NOT YOUR STARTUP DISK ) then get info on the drive. In this info window, at the very bottom, you should see a check box allowing for: ignore ownership on this volume. Please click this box.
Now, try creating folders on the drive...
If this does not work, I highly recommend reformatting this Hard Drive, that is assuming there is no valuable information on it.
After reformatting it, it really should work porperly.