Now you can store up to 40GB in the tiny DDS4 data cartridge from Sony. Featuring helical scan technology developed with Sony's video expertise, the DDS4's outstanding magnetic transfer characteristics support long-term archival storage and a low error rate. The key to this performance is Sony's anti-oxidation coated ultra-fine MP+++ (Metal Particle) magnetic material in the DDS4 tape. To assure reliability under the stress of repetitive read/write operations, Sony uses highly durable HCL (High Cross Linkage) binder with special additives. Sony's RDP mechanism sandwiches the tape between textured sheets to help maintain smooth tape winding. A high-strength lid guards against accidental breakage