I have two Seagate external drives. Both 3 TB. All of a sudden..I see 2 TBavailable or allocated and fomatted as NFTS and almost 1 TB unallocated and I cannot do anything to the drive. When I try to format the entire drive, I see exfat as my only option. I am trying to format the external usb drive from a 2003 r2 server. I have not seen this before. When I try to format the entire drive, I get "internal error."??