I'll check again, maybe NTSF. It's a singlepartition 1TB HD so it can't be FAT32. mw -- "Lose not thy airspeed, lest the ground rises up and smites thee." -- William Kershner http://crucis-court.com http://www.crucis.net/1632search On 05/27/2013 01:43 PM, Robert Nichols wrote: > On 05/27/2013 01:13 PM, Mike Watson wrote: >> Backup will be to an external (USB) removable HD. > What file system is on that external HD? FAT32 has a 4GB limit > for file size. >