Western Digital Red Plus internal hard drive 6 TB 5400 RPM 256 MB 3.5" Serial ATA IIITackle intensity with a WD Red Hard Drive Packed with power to handle the small to medium sized business NAS environments and increased workloads for SOHO customers, WD Red Plus is ideal for archiving and sharing, as well as RAID array rebuilding on systems using ZFS and other file systems. Built and tested for up to 8 bay NAS systems, these drives give you the flexibility, versatility, and confidence in storing and sharing your precious home and work