![Amazon.com: Western Digital WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4 : Electronics Amazon.com: Western Digital WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4 : Electronics](https://m.media-amazon.com/images/I/516ATVgjPOS._AC_UF894,1000_QL80_.jpg)
Amazon.com: Western Digital WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4 : Electronics
![New Original HDD For WD Red 4TB 3.5" SATA 6 Gb/s 64MB 5400RPM For Internal Hard Disk For NAS Hard Drive For WD40EFRX WD40EFAX New Original HDD For WD Red 4TB 3.5" SATA 6 Gb/s 64MB 5400RPM For Internal Hard Disk For NAS Hard Drive For WD40EFRX WD40EFAX](https://ae01.alicdn.com/kf/Hd0a261e66c05411386f230a3a10226692/New-Original-HDD-For-WD-Red-4TB-3-5-SATA-6-Gb-s-64MB-5400RPM-For.jpg)
New Original HDD For WD Red 4TB 3.5" SATA 6 Gb/s 64MB 5400RPM For Internal Hard Disk For NAS Hard Drive For WD40EFRX WD40EFAX
![Amazon.com: WD Red 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD40EFRX (Renewed) : Electronics Amazon.com: WD Red 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD40EFRX (Renewed) : Electronics](https://m.media-amazon.com/images/I/81Ssfzxf1RL.jpg)
Amazon.com: WD Red 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD40EFRX (Renewed) : Electronics
![WD40EFRX-68WT0N0 - Refurbished - WESTERN DIGITAL 4.0TB 5.4K RPM CLASS SATA 3.5 INCH LARGE FORM FACTOR LFF WD RED NASWARE 3.0 ADVANCED FORMAT AF 6GB/S SATA3 64MB CACHE HARD DRIVE ( 4000GB / 4TB ) WD40EFRX-68WT0N0 - Refurbished - WESTERN DIGITAL 4.0TB 5.4K RPM CLASS SATA 3.5 INCH LARGE FORM FACTOR LFF WD RED NASWARE 3.0 ADVANCED FORMAT AF 6GB/S SATA3 64MB CACHE HARD DRIVE ( 4000GB / 4TB )](https://www.itcreations.com/images/products/large/wd40efrx-68wt0n0_1.jpg?962017)
WD40EFRX-68WT0N0 - Refurbished - WESTERN DIGITAL 4.0TB 5.4K RPM CLASS SATA 3.5 INCH LARGE FORM FACTOR LFF WD RED NASWARE 3.0 ADVANCED FORMAT AF 6GB/S SATA3 64MB CACHE HARD DRIVE ( 4000GB / 4TB )
![Amazon.com: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX : Electronics Amazon.com: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX : Electronics](https://m.media-amazon.com/images/I/71AL3OYqTlL.jpg)
Amazon.com: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX : Electronics
![Amazon.com: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX : Electronics Amazon.com: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX : Electronics](https://m.media-amazon.com/images/I/81UQ2bqTcoL._AC_UF350,350_QL80_.jpg)
Amazon.com: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX : Electronics
![WD Red 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD40EFRX - Walmart.com WD Red 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD40EFRX - Walmart.com](https://i5.walmartimages.com/asr/3f2cdcd2-7b45-4de6-b47f-df288b5deedc_1.00a18180d5f3845f753268e2e1267df6.jpeg)
WD Red 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD40EFRX - Walmart.com
![Amazon.com: Western Digital WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4 : Electronics Amazon.com: Western Digital WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4 : Electronics](https://m.media-amazon.com/images/I/81f5g0jhRRL.jpg)
Amazon.com: Western Digital WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4 : Electronics
![Amazon.com: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX : Electronics Amazon.com: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX : Electronics](https://m.media-amazon.com/images/I/81kH1nM-CEL._AC_UF350,350_QL80_.jpg)