The ZM-VE350 is an external HDD case which is compatible with 2.5" SATA I/II/III HDD. The USB 3.0 interface supports quick and reliable data transfer to and from a PC. Pressing the Convenient One Touch Backup button once will automatically copy files to the selected folder. Pressing the button for more than 3 seconds will automatically turn power off, allowing the external hard drive to be removed safely without damaging the data.