The GoFlex Desk for Mac external drive delivers high-capacity storage and Time Machine software compatibility to backup all of your fles. Since the drive is formatted for Mac computers out of the box, it takes full advantage of all the tools the operating system has to offer. With up to 3TB of storage, plug-and-play FireWire 800 and USB 2.0 connectivity the GoFlex Desk for Mac drive is a perfect way to maximize capacity and interface speeds for Mac computers. The included FireWire 800/USB 2.0 adapter makes it easy to connect your Mac or PC computer and includes an integrated storage capacity gauge. Take advantage of the drive's versatile design, and get up to 10x faster transfer speeds by pairing the drive with the upgradable USB 3.0 desktop adapter. The drive can also be used interchangeably with both Mac and PC computers without reformatting by installing the downloadable HFS+ driver on the PC. This is the perfect solution for primarily Mac computer users who still regularly utilize a PC without any program limitation or fle size restrictions.