Now I am really confused. Never heard of a dreaded error code zero, and I don't know how the drive will interface with a Mac. If the drive was partitioned as a single 2 GB partition, then partitioning is irrelevant.
What do you see if you look at the drive attached to a Windows system?
Unasked-for advice: If that footage is important to you, have two copies. Either copy it to the external drive and don't erase it from the desktop, or have two external drives, or burn extra copies to DVDs. Otherwise, one failure and it is gone for good.