The QNAP TVS-871U-RP NAS is a powerful 8-bay 1U rackmount network attached storage device with 20TB storage capacity. Designed for professional use, it offers high performance and reliability with features like hot swap and RAID support. With a sleek black design and compact 3.5-inch form factor, this NAS is compatible with PCs and provides fast SATA II interface for data access. Currently uses 7 4TB hard drives configured to RAID 5. The 8th drive (drive 1) is dead and would need to be replaced if you want to use all 8 bays.