![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
![Western+Digital+Red+Plus+%285400RPM%2C+3.5%22%2C+SATA+III%2C+64MB+Cache%29+ 4TB+Internal+Enterprise+Drive+-+WD40EFRX for sale online | eBay Western+Digital+Red+Plus+%285400RPM%2C+3.5%22%2C+SATA+III%2C+64MB+Cache%29+ 4TB+Internal+Enterprise+Drive+-+WD40EFRX for sale online | eBay](https://i.ebayimg.com/images/g/1mwAAOSwv7tkkQwb/s-l1600.jpg)
Western+Digital+Red+Plus+%285400RPM%2C+3.5%22%2C+SATA+III%2C+64MB+Cache%29+ 4TB+Internal+Enterprise+Drive+-+WD40EFRX for sale online | eBay
![Amazon.com: Western Digital 4TB WD Red NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX : Electronics Amazon.com: Western Digital 4TB WD Red NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX : Electronics](https://m.media-amazon.com/images/I/81ND25rMFnL.jpg)
Amazon.com: Western Digital 4TB WD Red NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX : 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/seo/WD-Red-6TB-NAS-Hard-Disk-Drive-5400-RPM-Class-SATA-6Gb-s-64MB-Cache-3-5-Inch-WD60EFRX_9454489d-2abe-4236-b5b4-625da9239150_1.ba828cca806338c0646eede757145f59.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 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/71+3EwR3ABL._AC_UF894,1000_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
![Amazon.com: WD Red Pro 4TB NAS Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch - WD4001FFSX : Electronics Amazon.com: WD Red Pro 4TB NAS Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch - WD4001FFSX : Electronics](https://m.media-amazon.com/images/I/71n++WwxSnL.jpg)
Amazon.com: WD Red Pro 4TB NAS Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch - WD4001FFSX : Electronics
![Western+Digital+Red+Plus+%285400RPM%2C+3.5%22%2C+SATA+III%2C+64MB+Cache%29+ 4TB+Internal+Enterprise+Drive+-+WD40EFRX for sale online | eBay Western+Digital+Red+Plus+%285400RPM%2C+3.5%22%2C+SATA+III%2C+64MB+Cache%29+ 4TB+Internal+Enterprise+Drive+-+WD40EFRX for sale online | eBay](https://i.ebayimg.com/images/g/zZUAAOSwxbhkkQwa/s-l1600.jpg)
Western+Digital+Red+Plus+%285400RPM%2C+3.5%22%2C+SATA+III%2C+64MB+Cache%29+ 4TB+Internal+Enterprise+Drive+-+WD40EFRX for sale online | eBay
![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/11c4cbb4-4d10-4f19-8c2d-b6d6c9ff26ed_2.71bb35b18de944cdbdfc7482ebb18a84.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 4TB WD Red NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX : Electronics Amazon.com: Western Digital 4TB WD Red NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX : Electronics](https://m.media-amazon.com/images/I/81RWGa9RTrL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Western Digital 4TB WD Red NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX : Electronics
![Western Digital WD Red NAS Hard Disk Drive 2TB 4TB 6TB 8TB 12TB SATA 6GB/S 64 MB Cache 5400RPM HDD 3.5-Inch For Desktop Nas - AliExpress Western Digital WD Red NAS Hard Disk Drive 2TB 4TB 6TB 8TB 12TB SATA 6GB/S 64 MB Cache 5400RPM HDD 3.5-Inch For Desktop Nas - AliExpress](https://ae01.alicdn.com/kf/Sf9eb97dec65f4a0995a1fab1b3e02151Z/Western-Digital-WD-Red-NAS-Hard-Disk-Drive-2TB-4TB-6TB-8TB-12TB-SATA-6GB-S.jpg)