The SDT-S5000, SDT-S5200, SDT-S7000, SDT-S9000, TSL-S7000 and TSL-S9000 are all standalone Sony branded units. Ideal for extending the storage capacity of your PC, simple to use and easy to install. ??Sony has completely outstripped current DDS performance levels with the SDT-S7000, the industry's first quad-speed DDS drive. The SDT-S7000 is more than 50% faster than any conventional DDS-2 drive and holds 8 GB compressed data using its on-board DC-LZ data compression capabilities - twice the standard 4 GB uncompressed data that can be stored on a 120 m tape.