External storage problems

Anybody out there have any idea of why an external hard drive that I've emptied still insists it has no room.

I had a tech take a 250G HD out of a G5 because I needed to put bigger drives in the G5. He took the 250 and turned it into an external firewire for me. I've been working in the field using the drive off of my Mac Powerbook. It worked just fine. When I got back to the studio, I emptied it but it still says it only has 2.3G available.

Does anyone have any idea how to get this hard drive to store?

Note: The permissions are set to read and write. Is there something to do with formatting that I'm missing? It worked fine on the Powerbook as well as the G5.

Sheryl

I would make sure it is formatted MacOS HFS+ and if the drive is empty or the contents are not important; use Drive Utility to initialize it and even write all zeros to the entire drive.