Western Digital Red NAS 4TB 3.5" 5,400rpm SATA Hard Drive : New

New, internal 4TB (4,000GB) 3.5"Western Digital 5,400rpm Red NAS hard drive mechanism with serial ATA (SATA) interface.

This drive is compatible with any machine capable of housing a 3.5" SATA drive, but has also been tested to be working with the Aluminium iMac ranges 2009 and 2010 (21.5"/27").

(Please note, you will need to use the hard drive thermal sensor cable from your old drive to ensure the fans spin at the correct RPM speed. If you did not have a Western Digital drive fitted previously you will need to purchase the Western Digital Thermal Sensor Cable for your corresponding iMac range, as every manufacturer had a different connection type)