The Seagate Business Storage 8-Bay Rackmount NAS is all about design, ease of use, and capacity. Most 4-bay models have the swappable drives that can be swapped from the front. And given that you can only fit four 3.5" drives in a 19" NAS, Seagate had to be innovative with their design. Inside there are two rows of bays. Using the sliding rail kit that is included, users can just pull out the R8, open it up, and press a button to swap out a drive, no cables or tools needed. The same goes for the fans. An LED lights lets you know if you are placing the drives in properly.