Seagate Expansion USB 3.0 2.5" 4TB Portable External Hard Drive

Features:
Easy and simple to use - plug it in and go.
Fast file transfers with superspeed USB 3.0.
Compatible with USB 3.0 and USB 2.0.
Simply plug in the included power supply and USB cable.
Automatically recognized by Windows operating system, so there is no software to install or configure needed.
Drag and drop file saving, right out of the box.
Built-in power management ensures power-saving operation.
Please note: Product needs to be reformatted if it is to be used with Mac. Reformatting the drive will erase all content unless it is backed up to another drive.