Fast transmission speed:When the WD Elements portable storage device is connected to the USB 3.0 port， it can maximize data transfer.performance. The time it takes to transfer a full-length HD movie is much less than the time required by USB 2.0.Performance may vary depending on the user's hardware and operating system configuration.USB 3.0 and USB 2.0 compatibility:Fully compatible with the latest USB 3.0 devices and backward compatible with USB 2.0 devices.Small size and large capacity:WD Elements portable hard drives are compact， lightweight， and large in storage capacity， making them an ideal companion for consumers who want to carry ant files with them.Improve PC performance:When the internal hard disk is almost full， the performance of the PC will decrease. No need to delete files. By transferring files to your WD Elements to free up space on the built-in hard drive， you can make your PC run faster.WD quality is the same:We know that your data is ant to you. For this reason， we have built this hard drive in strict accordance with the standards of durability， shock resistance and long-term reliability， and designed a durable shell with stylish appearance and protective functions for it.Pre-formatted for Windows?:It has been formatted as NTFS， which is compatible with Windows 10， 8.1 and 7. It may need to be reformatted for other operating syst.