I have just installed a new Western Digital 120GB external firewire hard drive and am moving my video files onto it.  However, two large files, one 4.5GB and the other over 8GB, won't copy - I get an error message that there is insufficient disk space.  I've only filled about 11GB on the firewire HD so far.  I noticed after installation that this drive is formatted as FAT32.  Is that the problem?  Have I run into the 4GB limitation?  When I installed the firewire HD I was not asked how I wanted to format it, it did it automatically.  Can the HD be reformatted as NTFS?  If it can, how?