1、Compatible for Windows & Mac, without reformatting. 2、Small size with large capacity for photos, movies, files, etc., bringing more convenience to your life. 3、Metal surface designed uniquely and stylishly ensures its durability. 4、TOOLKIT backup software that requires downloading features three functions including backup, restoring and mirroring, which is practical and easy to use, providing convenient and reliable services for your important data. 5、USB 3.0 delivers high-speed transmission, for not only saving your space but also the transmission time, backward compatible with USB 2.0. Features: Compatible for Windows & Mac, without reformatting. Small size with large capacity for photos, movies, files, etc., bringing more convenience to your life. Metal surface designed uniquely and stylishly ensures its durability. TOOLKIT backup software that requires downloading features three functions including backup, restoring and mirroring, which is practical and easy to use, providing convenient and reliable services for your important data. USB 3.0 delivers high-speed transmission, for not only saving your space but also the transmission time, backward compatible with USB 2.0. Specification: Brand: Seagate Model: STHN1000400 (1TB), STHN2000400 (2TB), STHP4000400(4TB) Capacity: 1TB, 2TB, 4TB(Optional) Optional Color: Pink, Black, Red, Gold, Blue, Silver （1TB/2TB） Optional Color: Black, Silver, Blue, Red (4TB) Item Size: 114.8 * 78 * 11.7mm / 4.5 * 3.07 * 0.5inches (1TB/2TB), 115.3 * 80 * 20.9mm / 4.5 * 3.1 * 0.8inches (4TB) Item Weight: 126g / 4.4oz (1TB/2TB), 265g / 9.3oz (4TB) System Requirements: For Windows 7 or higher, Mac OS X 10, 11 or higher OS Package Include: 1 * Portable Hard Drive 1 * USB Cable 1 * Manual 1 * Portable Hard Drive 1 * USB Cable 1 * Manual