Yo adam, I just found the solution and wanted to pass it on to you. Problem is how the harddrive is formatted. I had mine formatted to fat32 to work on both mac and pc, but fat32 has a 4gb limit, hence the cutoff/error message.
Solution is working off a drive formatted HFS for mac (no 4gb limit)and using a software utility called Macdrive on the pc to read/write.
Hope this helps you out too!