The StoreJet 35T3 not only supports the USB 3.0 standard which increases data transfer speeds, but also offers a huge storage space for a seemingly endless amount of large files. - 3.5" SATA Hard Drive 4TB - SuperSpeed ​​USB 3.0 compatible and backward compatible with USB 2.0 - Power saving sleep mode - Fanless, Silent - Size: 172.4 x 152.4 x 44.8mm - Weight: 1040g - OneTouch Auto-Backup button* - 256.bit AES encryption* - Transcend Elite backup and security software* * Installation of Transcend Elite software is required to use these features