Amazon.com: MaxDigitalData MDD 4TB 64MB Cache 5900PM SATA 6.0Gb/s 3.5" Internal Surveillance CCTV DVR Hard Drive (MD4000GSA6459DVR) - w/ 2 Year Warranty : Electronics
Amazon.com: WL 4TB 64MB Cache 5400RPM SATA III (6.0Gb/s) (Low Power & Heavy Duty) 3.5" Internal Hard Drive (PC, NAS & CCTV DVR) - w/ 1 Year Warranty : Electronics
Amazon.com: WD Blue 4TB PC Hard Drive - 5400 RPM Class, SATA 6 Gb/s, 64 MB Cache, 3.5in - WD40EZRZ (Renewed) : Electronics
Amazon.com: Seagate ST4000DM000 Desktop Hdd 4TB Sata 6GB/s Ncq 64MB Cache 3.5in Internal Bare Drive (Renewed) : Electronics
Amazon.com: Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD40EZAZ : 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: Seagate Constellation ES ST4000NM0033 4TB 7200RPM 128MB Cache SATA 6.0Gb/s 3.5inch Internal Enterprise Hard Drive OEM - w/3 Year Warranty (Renewed) : Electronics
Amazon.com: WD40EZRX Western Digital 4TB Internal Hard Drive IntelliPower 64MB Cache SATA 6.0Gb : Electronics
Amazon.com: Seagate Portable 4TB External Hard Drive HDD – USB 3.0 for PC, Mac, Xbox, & PlayStation - 1-Year Rescue Service (STGX4000400) : Electronics
Amazon.com: WD Black 4TB Performance Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch - WD4001FAEX : Electronics
Amazon.com: SEAGATE TECHNOLOGY ST4000NM0023 HDD 4TB 7200RPM SAS 128MB (Renewed) : 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: Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD42PURZ : Electronics
Amazon.com: (Old Model) Seagate 4TB NAS HDD SATA 64MB Cache 3.5-Inch Internal Bare Drive (ST4000VN000) : Electronics
Amazon.com: DELL - SERVER ACCESSORY HDD 4TB 7.2K RPM NLSAS 12GBPS 3.5IN HOT-Plug Hard Drive : Electronics
Amazon.com: Western Digital Se Wd4000F9Yz 4Tb 7200Rpm Sata3/Sata 60 Gb/S 64Mb 3.5" Enterprise Hard Drive : Electronics
Amazon.com: Western Digital RE 4TB 7200RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive (WD4000FYYZ) OEM : Electronics
Amazon.com: Seagate Enterprise Capacity ST4000NM0024 4TB 7200RPM 128MB Cache SATA 6Gb/s 3.5-inch Internal Hard Drive - 5 Year Warranty (Renewed) : Electronics
Amazon.com: HGST Deskstar NAS 3.5-Inch 4TB 7200RPM SATA III 64MB Cache Internal Hard Drive Kit (0S03664) : Electronics
![Amazon.com: Western Digital Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - Western Digital40PURZ [Old Version] : Electronics](https://m.media-amazon.com/images/I/41azQ9rlX+L._AC_.jpg "Amazon.com: Western Digital Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - Western Digital40PURZ [Old Version] : Electronics")
Amazon.com: Western Digital Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - Western Digital40PURZ [Old Version] : Electronics
Amazon.com: Seagate 4TB Enterprise Capacity HDD 7200RPM SATA 6Gbps 128 MB Cache Internal Bare Drive (ST4000NM0033) (Renewed) : Electronics
Amazon.com: Western Digital 4TB 3.5 Inch SATA III, 7200 RPM, 64 MB Cache Enterprise Hard Drive (Western Digital4000FYYZ) : Electronics
Amazon.com: White Label WL 4TB 7200RPM 64MB Cache SATA 6.0Gb/s (Enterprise Grade) 3.5" Hard Drive (for Server, RAID, NAS, DVR, Desktop PC) w/1 Year Warranty : Electronics
Amazon.com: HGST Ultrastar 7K4000 (0F18567) 7200RPM SATA 6.0Gb/s 4TB 64MB Cache 3.5inch Internal Hard Drive - 3 Year Warranty (Renewed) : Electronics
