I think it's 12TB Google says "HP LTO-8 Ultrium, 30 TB, RW Data Cartridge Tape. Exhaustively tested, HPE LTO Ultrium cartridges meet all your demands for maxi

I think it's 12TB Google says "HP LTO-8 Ultrium, 30 TB, RW Data Cartridge Tape. Exhaustively tested, HPE LTO Ultrium cartridges meet all your demands for maximum reliability when restoring data, offering high storage density, ease of management and scalable storage and backup performance." TapeandMedia.com says "1 - HPE LTO Ultrium 8 Tape with a capacity of 12 TB and up to 30 TB compressed capacity."