The Western Digital RE is a 3.5" NAS with 65536 KB buffer size that offers 4000 storage space and is suitable for consumers, who want to keep up with their file-based data growth. With a spindle speed of 7200 RPM, along with SAS-2/SATA III interface, the RE model enables quick and efficient data transfer between network hosts. The dimensions of the storage unit are 1.02 inch height, 4 inch width, 5.78 inch depth, and its weight is 1.66 lbs.