The StoreJet J25M3S USB 3.1 portable hard drive combines the superior performance of USB 3.1, vast storage space of 4TB, and a three-stage shock protection system that meets U.S. military drop-test standards. It was designed with high endurance in mind, allowing you to store and share wherever you go. The StoreJet 25M3 features a three-stage shock protection system that has passed MIL-STD-810G US military transit drop test to fully protect data stored on the drive. The three-stage shock protection system includes a silicone rubber case, an internal shock-absorbing suspension damper, and a reinforced hard casing. It utilizes a USB Type-A connector that has undergone 10K plug-unplug tests. High durability means extra protection for your files. The StoreJet 25M3 portable hard drive is equipped with the USB 3.1 Gen 1 interface, providing lightning-fast transfer rates of up to 5Gbps. With up to 4TB of storage capacity, the StoreJet 25M3 is well suited for Mac and Windows users to save high-quality photos and videos, or a large number of documents. High capacity and compatibility make this a convenient storage solution! It is equipped with a one-touch auto-backup button that instantly backs up your data with just one press. The button also enables you to reconnect the hard drive to your PC without the need to unplug and reinsert it. Transcend's storage devices provide an exclusive disk lock and security functions. With Transcend Elite software, you can protect your entire drive and the files inside with passwords, meeting the high standard of information security. It has 3 years of warranty.