Hard Drives (HDD)
Ranked by price per gigabyte
Updated twice daily · No paid placements
As of , the cheapest hard drives (hdd) on BuyPerUnit costs $0.0275/GB — a Seagate Expansion Desktop 16TB External Hard Drive HDD - USB 3.0 - STKP16000400 available at Newegg for $439.99. BuyPerUnit tracks 1155 hard drives (hdd) products across Amazon, Best Buy, and Newegg, updated twice daily. The median price is $0.0660/GB. Methodology: price ÷ capacity.
Ranked by:$/GB
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- 1Seagate - Seagate One Touch Desktop HDD 24 TB - Space Gray
Seagate · HDD · 2-yr warranty · 5.0 (2)
Best Buy24% below this page’s avg- Capacity
- 24 TB
- Price
- $739.99checked 5h ago
- $/GB
- $0.031
- 2Seagate BarraCuda NE-ST8000DM004 8TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive Bare Drive
Seagate · HDD
Newegg90d low- Capacity
- 8TB
- Price
- $249.99checked 5h ago
- $/GB
- $0.031
- 3Seagate BarraCuda 8 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST8000DMZ04/004)
Seagate · HDD
Amazon90d low- Capacity
- 8 TB
- Price
- $249.99checked 5h ago
- $/GB
- $0.031
- 4Seagate Exos X16 ST14000NM001G 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Hard Drive
Seagate · HDD
Newegg90d low- Capacity
- 14TB
- Price
- $439.32checked 5h ago
- $/GB
- $0.031
- 5WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4)
Western Digital · HDD
Newegg90d low- Capacity
- 18TB
- Price
- $568.54checked 5h ago
- $/GB
- $0.032
- 6
- Capacity
- 16 TB
- Price
- $517.92checked 5h ago
- $/GB
- $0.032
- 7Seagate - Seagate One Touch Desktop HDD 20 TB - Space Gray
Seagate · HDD · 2-yr warranty · 4.0 (1)
Best Buy- Capacity
- 20 TB
- Price
- $649.99checked 5h ago
- $/GB
- $0.033
- 8Hitachi GST Deskstar 5K3000 HDS5C3030ALA630 (0F12460) 3TB 5700 RPM 32MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive Bare Drive
Hitachi · HDD
Newegg- Capacity
- 3TB
- Price
- $99.20checked 5h ago
- $/GB
- $0.033
- 9MaxDigitalData 6TB 7200RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive for Surveillance (MD6000GSA12872DVR) - 3 Years Warranty
MDD MAXDIGITALDATA · HDD · 3-yr warranty
Amazon90d low- Capacity
- 6 TB
- Price
- $199.99checked 5h ago
- $/GB
- $0.033
- 10WD Ultrastar DC HC550 16TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38462 (WUH721816ALE6L4)
Western Digital · HDD
Newegg90d low- Capacity
- 16TB
- Price
- $555.41checked 29h ago
- $/GB
- $0.035
- 11MDD MAXDIGITALDATA MaxDigitalData 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5inch Internal Hard Drive for NAS Network Storage (MD8000GSA25672NAS)
MDD MAXDIGITALDATA · HDD · 3-yr warranty
Amazon- Capacity
- 8 TB
- Price
- $279.99checked 5h ago
- $/GB
- $0.035
- 12
- Capacity
- 10TB
- Price
- $349.99checked 5h ago
- $/GB
- $0.035
- 13HGST Ultrastar 7K3000 HUA723030ALA640 (0F12456) 3TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5' Enterprisel Hard Drive Bare Drive
HGST · HDD
Newegg- Capacity
- 3TB
- Price
- $105.00checked 5h ago
- $/GB
- $0.035
- 14Seagate IronWolf Pro 14 TB NAS RAID Internal Hard Drive - 7,200 RPM SATA 6 Gb/s 3.5-inch (ST14000NE0008)
Seagate · HDD
Newegg- Capacity
- 14TB
- Price
- $498.00checked 4h ago
- $/GB
- $0.036
- 15seagate ironwolf pro st14000ne0008 14 tb hard drive - 3.5' internal - sata (sata/600)
Seagate · HDD
Newegg- Capacity
- 14TB
- Price
- $500.99checked 5h ago
- $/GB
- $0.036
- 16Seagate Skyhawk 6TB Video Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with in-House Rescue Services (ST6000VXZ09/009)
Seagate · HDD · 3-yr warranty
Amazon90d low- Capacity
- 6 TB
- Price
- $214.99checked 5h ago
- $/GB
- $0.036
- 17HP 614827-001 3Tb 7200Rpm 3.5Inch 6G Sata Sc Lff Midline Hard Drive With Tray For Gen8 Servers Only
HP · HDD
Newegg- Capacity
- 3TB
- Price
- $108.19checked 5h ago
- $/GB
- $0.036
- 18Seagate - Seagate One Touch Desktop HDD 8 TB - Space Gray
Seagate · HDD · 2-yr warranty · 4.5 (32)
Best Buy- Capacity
- 8 TB
- Price
- $289.99checked 5h ago
- $/GB
- $0.036
- 19Dell - 2 TB 7200 RPM Enterprise SATA 3.5' Hard Drive for PowerEdge / PowerVault Systems. Equipped with tray. Mfr P/N: 2G4HM
Dell · HDD
Newegg- Capacity
- 2TB
- Price
- $74.00checked 5h ago
- $/GB
- $0.037
- 20HGST Ultrastar He8 HUH728060ALE600 (0F23269) 6TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5' Helium Platform Enterprise Hard Disk Drives
HGST · HDD
Newegg- Capacity
- 6TB
- Price
- $222.00checked 29h ago
- $/GB
- $0.037
- 21HGST HDS724040ALE640 Deskstar 7K4000 HDS724040ALA640 4 TB Hard Drive - 3.5' Internal - SATA (SATA/600)
HGST · HDD
Newegg- Capacity
- 4TB
- Price
- $150.00checked 5h ago
- $/GB
- $0.037
- 22Seagate Barracuda XT ST4000DX000 4 TB Hard Drive - SATA [SATA/600] - 3.5 Drive - Internal (ST4000DX000)
Seagate · HDD
Newegg- Capacity
- 4TB
- Price
- $150.00checked 5h ago
- $/GB
- $0.037
- 23Seagate IronWolf ST12000VN0008 12 TB Hard Drive - 3.5' Internal - SATA (SATA/600) (ST12000VN0008) - OEM Pack, International Version No Warranty
Seagate · HDD
Newegg- Capacity
- 12TB
- Price
- $450.00checked 5h ago
- $/GB
- $0.037
- 24
- Capacity
- 6TB
- Price
- $225.10checked 5h ago
- $/GB
- $0.038
- 25Seagate Constellation ES.3 ST3000NM0033 3TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5' Enterprise Internal Hard Drive Bare Drive
Seagate · HDD
Newegg- Capacity
- 3TB
- Price
- $112.99checked 41h ago
- $/GB
- $0.038
- 26WD Blue 8TB Desktop Hard Disk Drive - 5640 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD80EAAZ
Western Digital · HDD
Newegg- Capacity
- 8TB
- Price
- $304.00checked 5h ago
- $/GB
- $0.038
- 27Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray
Seagate · HDD · 2-yr warranty · 4.0 (1)
Best Buy- Capacity
- 16 TB
- Price
- $609.99checked 5h ago
- $/GB
- $0.038
- 28Seagate IronWolf Pro 14TB NAS Internal Hard Drive - CMR 3.5' SATA 6Gbps, 7200 RPM, 256MB Cache, 250Mbps Data Transfer Rate (ST14000NE0008)
Seagate · HDD
Newegg- Capacity
- 14TB
- Price
- $535.99checked 5h ago
- $/GB
- $0.038
- 29Toshiba-IMSourcing MG04ACA 6 TB 3.5' Internal Hard Drive - SATA - 7200rpm - 128 MB Buffer
Toshiba · HDD
Newegg- Capacity
- 6TB
- Price
- $231.18checked 5h ago
- $/GB
- $0.039
- 30TOSHIBA HDWG62CUZSVA 22TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive Retail
Toshiba · HDD
Newegg- Capacity
- 22TB
- Price
- $849.00checked 5h ago
- $/GB
- $0.039
- 31Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ
Western Digital · HDD · 2-yr warranty
Amazon90d low- Capacity
- 8 TB
- Price
- $309.99checked 5h ago
- $/GB
- $0.039
- 32Seagate Exos X18 ST16000NM001J 16 TB Hard Drive - Internal - SATA (SATA/600) - Video Surveillance System, Storage System Device Supported - 7200rpm
Seagate · HDD
Newegg- Capacity
- 16TB
- Price
- $622.10checked 5h ago
- $/GB
- $0.039
- 33Seagate IronWolf Pro ST16000NT001 16TB 7200 RPM 256MB Cache 3.5' Internal Hard Drive - OEM
Seagate · HDD
Newegg90d low- Capacity
- 16TB
- Price
- $623.00checked 5h ago
- $/GB
- $0.039
- 34
- Capacity
- 2TB
- Price
- $77.95checked 5h ago
- $/GB
- $0.039
- 35seagate barracuda pro performance internal hard drive sata hdd 14tb 6gb/s 256mb cache 3.5-inch - frustration free packaging (st14000dm001)
Seagate · HDD
Newegg- Capacity
- 14TB
- Price
- $545.99checked 17h ago
- $/GB
- $0.039
- 36Seagate IronWolf Pro, 16 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage (ST16000NT001)
Seagate · HDD
Amazon- Capacity
- 16 TB
- Price
- $629.99checked 5h ago
- $/GB
- $0.039
- 37Seagate IronWolf Pro 18TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5' Internal HDD ST18000NE000
Seagate · HDD
Newegg- Capacity
- 18TB
- Price
- $710.00checked 5h ago
- $/GB
- $0.039
- 38Seagate IronWolf Pro ST18000NE000 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive
Seagate · HDD
Newegg- Capacity
- 18TB
- Price
- $710.99checked 5h ago
- $/GB
- $0.039
- 39WL 3TB 7200RPM 64MB Cache SATA III 6.0Gb/s 3.5" Internal Desktop Hard Drive (For RAID, NAS, DVR, Desktop PC) w/1 Year Warranty
white label · HDD
Amazon- Capacity
- 3 TB
- Price
- $119.95checked 5h ago
- $/GB
- $0.040
- 40MDD MAXDIGITALDATA (MDD4000GSA6472 4TB 7200RPM 64MB Cache SATA 6.0Gb/s 3.5inch Internal Desktop Hard Drive (for Desktop PC, Mac, CCTV DVR, Surveillence, Server, NAS)
MDD MAXDIGITALDATA · HDD · 3-yr warranty
Amazon- Capacity
- 4 TB
- Price
- $159.99checked 5h ago
- $/GB
- $0.040
- 41Seagate BarraCuda ST4000DM004 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5' Hard Drives Bare Drive - OEM
Seagate · HDD
Newegg- Capacity
- 4TB
- Price
- $159.99checked 5h ago
- $/GB
- $0.040
- 42WL 4TB 64MB Cache 5400RPM SATA III (6.0Gb/s) 3.5" Internal Surveillance DVR Hard Drive - w/ 1 Year Warranty
GoHardDrive · HDD
Amazon- Capacity
- 4 TB
- Price
- $159.99checked 5h ago
- $/GB
- $0.040
- 43Seagate Skyhawk 4TB Video Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 64MB Cache for DVR NVR Security Camera System with Drive Health Management and in-House Rescue Services (ST4000VXZ16/016)
Seagate · HDD · 3-yr warranty
Amazon90d low- Capacity
- 4 TB
- Price
- $159.99checked 5h ago
- $/GB
- $0.040
- 44Seagate SkyHawk AI ST10000VE0008 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive Bare Drive
Seagate · HDD
Newegg- Capacity
- 10TB
- Price
- $403.00checked 29h ago
- $/GB
- $0.040
- 45WD Blue 6TB Desktop Hard Disk Drive - 5400 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD60EZAX
Western Digital · HDD
Newegg- Capacity
- 6TB
- Price
- $243.00checked 5h ago
- $/GB
- $0.041
- 46Seagate Enterprise Capacity 3.5'' HDD 8TB 7200 RPM 4Kn SATA 6Gb/s 256MB Cache Internal Hard Drive ST8000NM0045
Seagate · HDD
Newegg- Capacity
- 8TB
- Price
- $325.00checked 5h ago
- $/GB
- $0.041
- 47Seagate IronWolf Pro 22TB Enterprise NAS Internal HDD - CMR 3.5in SATA 6Gb/s 7200 RPM (ST22000NT001)
Seagate · HDD
Newegg- Capacity
- 22TB
- Price
- $899.99checked 5h ago
- $/GB
- $0.041
- 48Seagate BarraCuda Pro ST14000DM001 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive
Seagate · HDD
Newegg- Capacity
- 14TB
- Price
- $575.99checked 5h ago
- $/GB
- $0.041
- 49WD - Blue 8TB PC Internal Hard Drive for Desktops
Western Digital · HDD · 215 / 215 MB/s · 2-yr warranty · 4.2 (21)
Best Buy- Capacity
- 8 TB
- Price
- $329.99checked 5h ago
- $/GB
- $0.041
- 50Seagate SkyHawk AI ST12000VE0008 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive Bare Drive
Seagate · HDD
Newegg- Capacity
- 12TB
- Price
- $495.00checked 29h ago
- $/GB
- $0.041
- 51Seagate IronWolf Pro 14TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5' Internal HDD ST14000NE0008
Seagate · HDD
Newegg- Capacity
- 14TB
- Price
- $579.69checked 5h ago
- $/GB
- $0.041
- 52Seagate IronWolf Pro, 20 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage (ST20000NT001)
Seagate · HDD
Amazon- Capacity
- 20 TB
- Price
- $829.99checked 5h ago
- $/GB
- $0.042
- 53Seagate IronWolf Pro ST16000NE000 16 TB Hard Drive - 3.5' Internal - SATA (SATA/600) (ST16000NE000)
Seagate · HDD
Newegg- Capacity
- 16TB
- Price
- $664.00checked 5h ago
- $/GB
- $0.042
- 54WD Green WD30EZRX 3TB IntelliPower 64MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive Bare Drive
Western Digital · HDD
Newegg- Capacity
- 3TB
- Price
- $125.00checked 5h ago
- $/GB
- $0.042
- 55Western Digital 10TB WD Blue Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD100EAGZ
Western Digital · HDD · 2-yr warranty
Amazon- Capacity
- 10 TB
- Price
- $419.99checked 5h ago
- $/GB
- $0.042
- 56WD Blue WD100EAGZ 10TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive
Western Digital · HDD
Newegg- Capacity
- 10TB
- Price
- $419.99checked 5h ago
- $/GB
- $0.042
- 57
- Capacity
- 3TB
- Price
- $126.19checked 17h ago
- $/GB
- $0.042
- 58Western Digital 12TB WD Blue Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD120EAGZ
Western Digital · HDD · 2-yr warranty
Amazon- Capacity
- 12 TB
- Price
- $504.99checked 5h ago
- $/GB
- $0.042
- 59WD Blue WD120EAGZ 12TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive
Western Digital · HDD
Newegg- Capacity
- 12TB
- Price
- $504.99checked 5h ago
- $/GB
- $0.042
- 60Hitachi GST Ultrastar A7K2000 0F10452 2TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5' Internal Hard Drive Bare Drive
Hitachi · HDD
Newegg- Capacity
- 2TB
- Price
- $84.20checked 5h ago
- $/GB
- $0.042
- 61Seagate Barracuda ST4000DM004 4 TB Hard Drive - 3.5' Internal - SATA (SATA/600) (ST4000DM004)
Seagate · HDD
Newegg- Capacity
- 4TB
- Price
- $168.99checked 5h ago
- $/GB
- $0.042
- 62
- Capacity
- 16TB
- Price
- $676.30checked 5h ago
- $/GB
- $0.042
- 63Seagate SkyHawk AI ST12000VE0008 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive Bare Drive - OEM
Seagate · HDD
Newegg- Capacity
- 12TB
- Price
- $508.99checked 5h ago
- $/GB
- $0.042
- 64Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive
Seagate · HDD
Newegg- Capacity
- 20TB
- Price
- $848.88checked 2d ago
- $/GB
- $0.042
- 65White Label WL 4TB 7200RPM 64MB Cache SATA 6.0Gb/s (Enterprise Grade) 3.5" Hard Drive (for Server, RAID, NAS, DVR, Desktop PC)
White Label · HDD
Amazon- Capacity
- 4 TB
- Price
- $169.95checked 5h ago
- $/GB
- $0.042
- 66Seagate Ironwolf pro 16tb nas internal hard drive hdd - cmr 3.5 inch sata 6gb/s 7200 rpm 256mb cache for raid network attached storage, data
Seagate · HDD
Newegg- Capacity
- 16TB
- Price
- $679.99checked 5h ago
- $/GB
- $0.042
- 67WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE
Western Digital · HDD
Newegg- Capacity
- 2TB
- Price
- $85.00checked 5h ago
- $/GB
- $0.043
- 68Seagate BarraCuda ST24000DM001 24TB 7200 RPM SATA 6.0Gb/s 3.5' Hard Drive Bare Drive
Seagate · HDD
Newegg- Capacity
- 24TB
- Price
- $1022.35checked 5h ago
- $/GB
- $0.043
- 69Seagate Exos X18 ST18000NM000J 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive
Seagate · HDD
Newegg- Capacity
- 18TB
- Price
- $768.69checked 5h ago
- $/GB
- $0.043
- 70Seagate IronWolf ST16000VN001 16TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive
Seagate · HDD
Newegg- Capacity
- 16TB
- Price
- $686.99checked 5h ago
- $/GB
- $0.043
- 71Seagate IronWolf ST10000VN000 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Hard Drives Bare Drive
Seagate · HDD
Newegg- Capacity
- 10TB
- Price
- $429.99checked 5h ago
- $/GB
- $0.043
- 72Seagate SkyHawk AI ST16000VE002 16TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive
Seagate · HDD
Newegg- Capacity
- 16TB
- Price
- $691.99checked 5h ago
- $/GB
- $0.043
- 73Seagate Exos X18 ST14000NM000J 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Hard Drives
Seagate · HDD
Newegg- Capacity
- 14TB
- Price
- $605.99checked 5h ago
- $/GB
- $0.043
- 74Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD120EFGX
Western Digital · HDD
Amazon- Capacity
- 12 TB
- Price
- $524.61checked 5h ago
- $/GB
- $0.044
- 75
- Capacity
- 16TB
- Price
- $699.99checked 5h ago
- $/GB
- $0.044
- 76Seagate Exos 7E10 ST8000NM017B 8 TB Hard Drive - Internal - SATA (SATA/600) - Storage System, Video Surveillance System Device Supported - 7200rpm
Seagate · HDD
Newegg- Capacity
- 8TB
- Price
- $349.99checked 5h ago
- $/GB
- $0.044
- 77
- Capacity
- 4TB
- Price
- $175.00checked 5h ago
- $/GB
- $0.044
- 78Seagate BarraCuda Pro Performance Internal Hard Drive SATA HDD 8TB 6GB/s 256MB Cache 3.5-Inch (ST8000DM0004) (ST8000DM004 )
Seagate · HDD
Newegg- Capacity
- 8TB
- Price
- $350.10checked 5h ago
- $/GB
- $0.044
- 79Seagate IronWolf Pro ST18000NT001 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive
Seagate · HDD
Newegg- Capacity
- 18TB
- Price
- $789.99checked 5h ago
- $/GB
- $0.044
- 80Seagate Exos X20 ST20000NM007D 20TB 7200 RPM 256MB Cache 3.5' Internal Hard Drive
Seagate · HDD
Newegg- Capacity
- 20TB
- Price
- $877.99checked 5h ago
- $/GB
- $0.044
- 81Seagate Barracuda ST4000DM004 Internal Hard Drive 4TB (4000GB) 3.5' PC Computer Disk SATA III 6Gb/s 256MB cache
Seagate · HDD
Newegg- Capacity
- 4TB
- Price
- $175.99checked 5h ago
- $/GB
- $0.044
- 82Seagate Exos X18 ST12000NM001J 12 TB Hard Drive - Internal - SATA (SATA/600) - Conventional Magnetic Recording (CMR) Method - Storage System, Video
Seagate · HDD
Newegg- Capacity
- 12TB
- Price
- $529.99checked 5h ago
- $/GB
- $0.044
- 83Seagate IronWolf Pro 24TB Enterprise NAS Internal HDD Hard Drive – CMR 3.5 Inch SATA 6Gb/s 7200 RPM 512MB Cache for RAID Network Attached Storage, Rescue Services (ST24000NT002)
Seagate · HDD · 5-yr warranty
Amazon- Capacity
- 24 TB
- Price
- $1059.99checked 5h ago
- $/GB
- $0.044
- 84WD Purple 6TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD60PURX
Western Digital · HDD
Newegg- Capacity
- 6TB
- Price
- $266.30checked 5h ago
- $/GB
- $0.044
- 85Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004)
Seagate · HDD
Newegg- Capacity
- 16TB
- Price
- $715.00checked 5h ago
- $/GB
- $0.045
- 86Western Digital 20TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD202KFGX
Western Digital · HDD · 5-yr warranty
Amazon- Capacity
- 20 TB
- Price
- $897.04checked 5h ago
- $/GB
- $0.045
- 87Western Digital 2TB WD Blue PC Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD20EZBX
Western Digital · HDD · 2-yr warranty
Amazon- Capacity
- 2 TB
- Price
- $89.99checked 5h ago
- $/GB
- $0.045
- 88Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 128 MB Cache, 3.5" - WD40EZZX
Western Digital · HDD
Amazon- Capacity
- 4 TB
- Price
- $179.99checked 5h ago
- $/GB
- $0.045
- 89WD - Blue 4TB PC Internal Hard Drive for Desktops
Western Digital · HDD · 180 / 180 MB/s · 2-yr warranty · 4.5 (11)
Best Buy- Capacity
- 4 TB
- Price
- $179.99checked 5h ago
- $/GB
- $0.045
- 90WD Red Pro 12TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive - WD122KFBX
Western Digital · HDD
Newegg90d low- Capacity
- 12TB
- Price
- $539.99checked 5h ago
- $/GB
- $0.045
- 91Seagate Exos X16 ST14000NM003G 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Hard Drives, 512E/4KN, SED Bare Drive
Seagate · HDD
Newegg- Capacity
- 14TB
- Price
- $630.10checked 5h ago
- $/GB
- $0.045
- 92Seagate IronWolf Pro 12TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive ST12000NE0007
Seagate · HDD
Newegg90d low- Capacity
- 12TB
- Price
- $540.10checked 5h ago
- $/GB
- $0.045
- 93Seagate Exos X14 ST12000NM0008 12 TB Hard Drive - 512e Format - SATA (SATA/600) - 3.5' Drive - Internal
Seagate · HDD
Newegg- Capacity
- 12TB
- Price
- $540.99checked 5h ago
- $/GB
- $0.045
- 94Seagate BarraCuda Pro ST8000DM0004 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Hard Drive Bare Drive
Seagate · HDD
Newegg- Capacity
- 8TB
- Price
- $362.00checked 29h ago
- $/GB
- $0.045
- 95Western Digital 10TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD100EFGX
Western Digital · HDD · 260 / 260 MB/s · 3-yr warranty
Amazon- Capacity
- 10 TB
- Price
- $454.99checked 5h ago
- $/GB
- $0.045
- 96Western Digital 12TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD122KFBX
Western Digital · HDD · 5-yr warranty
Amazon- Capacity
- 12 TB
- Price
- $546.06checked 5h ago
- $/GB
- $0.046
- 97Seagate IronWolf Pro ST12000NT001 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive
Seagate · HDD
Newegg- Capacity
- 12TB
- Price
- $549.99checked 5h ago
- $/GB
- $0.046
- 98
- Capacity
- 6TB
- Price
- $275.00checked 5h ago
- $/GB
- $0.046
- 99Seagate IronWolf Pro ST14000NT001 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive
Seagate · HDD
Newegg- Capacity
- 14TB
- Price
- $641.99checked 5h ago
- $/GB
- $0.046
- 100WD Purple 6TB Surveillance Hard Disk Drive - 5700 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD60PURZ
Western Digital · HDD
Newegg- Capacity
- 6TB
- Price
- $275.50checked 5h ago
- $/GB
- $0.046
Most tracked Hard Drives (HDD)
Products with the longest price history on BuyPerUnit
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- NRICO 2.5 Inch Portable External Hard Drive Ultra-Slim HDD USB 3.0 500GB | Plug & Play Hard Drive for Backup,PC, Mac, Laptop, PS4, Xbox one,Xbox 360(Blue)
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Buy Cheap Hard Drives: Find the Best HDD Deals in 2026
Looking to buy cheap hard drives? You're in the right place. BuyPerUnit compares 1155+ HDDs ranked by price per gigabyte — a capacity-cost comparison to use alongside compatibility, performance and warranty.
Right now, the cheapest HDD storage starts at just $0.027/GB, while the average on this page is $0.040/GB. Whether you need bulk storage for backups, a NAS, or a media server, we help you find the best deal. For faster storage, compare SSDs here.
HDD Buying Guide: Get the Best Value
1. Compare Price Per GB
A $150 4TB drive ($0.037/GB) beats a $70 1TB drive ($0.07/GB) in value. Always divide price by capacity to find the real cost — that's what we do for every listing.
2. Bigger = Cheaper Per GB
Storage follows economies of scale. 4TB+ drives almost always have the lowest price per gigabyte. Buy more capacity upfront to save long-term.
3. Match RPM to Your Use Case
7200 RPM drives are faster and better for desktop use or active NAS workloads. 5400 RPM drives run cooler and quieter — ideal for bulk archival or always-on backup drives where speed is less critical.
4. Watch for Sales
Hard drive prices fluctuate. We update prices daily so you can catch the best deals. Bookmark this page and check back regularly.
3.5" Desktop vs 2.5" Laptop HDD: Which Should You Buy?
| Type | Typical $/GB | Max Capacity | Best For |
|---|---|---|---|
| 3.5" Desktop HDD | $0.015–0.025 | 20TB+ | Desktop PC, NAS, media server |
| 2.5" Laptop HDD | $0.025–0.045 | 5TB | Laptop upgrade, portable use |
| External HDD | $0.020–0.040 | 20TB+ | Backup, portable storage, archiving |
Frequently Asked Questions About Buying Hard Drives
What is the cheapest hard drive per GB right now?
The cheapest HDD storage per gigabyte is currently $0.0275/GB. Large capacity 3.5" desktop drives (6TB+) from Seagate or WD consistently offer the lowest price per gigabyte in the HDD category.
Is it better to buy one large hard drive or multiple smaller ones?
One large drive is almost always cheaper per GB. However, multiple drives provide redundancy — if one fails, you don't lose everything. For important data, consider buying two drives and keeping backups on both.
Should I buy 5400 RPM or 7200 RPM?
For desktop use or a NAS with active read/write workloads, 7200 RPM is noticeably faster and worth the small premium. For cold storage, archival backups, or always-on low-activity drives, 5400 RPM runs cooler, quieter, and uses less power.
When is the best time to buy cheap hard drives?
Black Friday, Cyber Monday, and Amazon Prime Day typically have the best deals. However, prices fluctuate year-round. We update our rankings daily so you can always find the current best value.
What brands make the most reliable hard drives?
Seagate, Western Digital (WD), and Toshiba are the three major HDD manufacturers. All produce reliable drives at different price points. Seagate Barracuda and WD Blue are popular desktop choices; WD Red and Seagate IronWolf are designed for NAS use.
How We Find the Cheapest Hard Drives
BuyPerUnit calculates the price per gigabyte for every hard drive by dividing the current price by the storage capacity. This gives you the true cost of storage, making it easy to compare drives of different sizes.
Products are ranked from best value (lowest $/GB) to worst. We update prices regularly from Amazon, Best Buy, and Newegg to ensure you always see current deals. Click any product to view the latest price and purchase directly.
BuyPerUnit is an affiliate site. We earn a commission when you purchase through our links at no extra cost to you.
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