Teac"s new line of high-end 3.5" external hard disk drives are pre-formatted and ready to go! You can add reliable, high-performance storage instantly to your PC or Mac systems. Multiple drives could be added to deliver unlimited capacity! Featuring fast access time, these drives deliver the fastest performance for data storage, backup or transporting large files between systems. Simply plug into a USB port and within seconds, your valuable data is securely transferred. The new sleek and rugged aluminum case design maximizes heat dissipation and keeps the hard disk drive running cooler for optimum performance.