Fuji DDS-4, 20/40GB The Fuji DDS-4 20/40 GB provides a stable and highly efficient data storage environment for assuring your most important data safe and sound. Featuring 20 GB of native data storage and 40 GB of compressed data storage, the DDS 4 tape cartridge offers a sizable amount of space for data backups. The Fuji DDS-4 20/30 also offers data transfer rate of 3.0 MB/second and a 5,000 head pass durability.