We no longer carry WD Red Plus WD40EFZX - hard drive - 4 TB - SATA 6Gb/s (6444503), but we found this replacement for you. Compare the discontinued item to the replacement item:
Know your gear
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 files.