4TB Western Digital WD40EFRX WD Red NAS 3.5" SATA HDD Hard Disk Drive
The WD Red 4TB WD40EFRX is specifically designed for NAS (Network Attached Storage) systems with 1 to 8 drive bays. Model Number: WD40EFRX. 1 x Western Digital WD Red 4TB 3.5" NAS Hard Drive (WD40EFRX).