Maxell LTO Ultrium-4 Data Tape Cartridge (800GB/1600GB) Maxell's LTO 4 data tapes hold twice the capacity of the LTO 3 with up to 1.6TB and has a 50% faster transfer rate of 240MB per second. It features new encryption capabilities to safely transfer and store sensitive information. Maxell's LTO 4 tapes go through extensive testing to confirm interchange compatibility with other media. LTO Ultrium products are then 100% compatible with previous generations of Maxell LTO media and drives. It is able to perform 250 back-ups and is backwards compatible with LTO 2 and LTO 3 data cartridges only.