WD Elements portable hard drives offer reliable, high-capacity storage, fast data transfer rates and universal connectivity with USB 3.0 and USB 2.0 devices to back up your photos, videos and files on the go. RAM 4 TB Hard Drive 4 TB Portable Number of USB 2.0 Ports 1 Other Technical Details Brand Western Digital Series Elements Portable Item model number WDBU6Y0040BBK-WESN Hardware Platform PC, Mac Operating System PC; Mac Item Weight 0.705 ounces Product Dimensions 4.4 x 3.2 x 0.83 inches Item Dimensions LxWxH 4.4 x 3.2 x 0.83 inches Color Black Flash Memory Size 256 Batteries 1 Lithium ion batteries required. Manufacturer Western Digital الحالة جديد