Silicon Power HDD 4 TB External USB Hard Drive. This drive features a SuperSpeed USB 3.1 Gen1 interface for outstanding read/write speed, saving you time when editing or storing large files like graphics and HD videos. Its ultra-rugged rubber casing and internal suspension system provide perfect buffer effects and assure rigid protection against crushes, dust, and spraying water. The drive also includes an innovative cable-carry design for simple storage and an anti-slip, anti-scratch surface texture to prevent damages from fingerprints and scratches.