Hard Drives (HDD)

Ranked by price per gigabyte

Updated daily · No paid placements

As of May 2026, the cheapest hard drives (hdd) on BuyPerUnit costs $0.0150/GB — a Unknown MDD MAXDIGITALDATA 4TB 7200RPM 128MB Cache SAS 12Gb/s 3.5inch Internal Enterprise Hard Drive (MD4TSAS12872E) - [NOT a SATA HDD] (Renewed) (4 TB) available at Amazon for $59.95. BuyPerUnit tracks 363 hard drives (hdd) products across Amazon, Best Buy, and Newegg, updated daily. The average price is $0.0331/GB.
Ranked by:$/GB
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1

MDD MAXDIGITALDATA 4TB 7200RPM 128MB Cache SAS 12Gb/s 3.5inch Internal Enterprise Hard Drive (MD4TSAS12872E) - [NOT a SATA HDD] (Renewed)

UnknownAmazon55% below avg

Capacity

4 TB

Price

$59.95

$/GB

$0.015

Check Price at Amazon
2

Seagate Expansion 22TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP22000400)

SeagateAmazon1yrHDD31% below avg

Capacity

22 TB

Price

$499.99

$/GB

$0.023

Check Price at Amazon
3

Avolusion PRO-H1 Series 14TB 7200RPM USB 3.2 Gen2 (10Gbps) External Hard Drive (for Windows or MacOS Desktop PC/Laptop)

AvolusionAmazon2yrHDD27% below avg

Capacity

14 TB

Price

$339.99

$/GB

$0.024

Check Price at Amazon
4

Seagate Expansion 6TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP6000400)

SeagateAmazonHDD29% this week

Capacity

6 TB

Price

$149.90

$/GB

$0.025

Check Price at Amazon
5

Seagate - Game Drive for Xbox 8TB External USB 3.2 Gen 1 Desktop Hard Drive with Certified Xbox Green LED Lighting - Black

SeagateBest BuyHDD
4.6(78)
24% below avg

Capacity

8 TB

Price

$199.99

$/GB

$0.025

Check Price at Best Buy
6

Water Panther WP Arsenal 8TB SAS 12Gb/s 7200RPM 3.5-Inch DAS Hard Drive for Storage Server, Enterprise JBOD, Business RAID Workstation, Internal SAS LFF HDD (Renewed)

UnknownAmazon21% below avg

Capacity

8 TB

Price

$209.00

$/GB

$0.026

Check Price at Amazon
7

WD - D10 Game Drive for Xbox 12TB External USB 3.2 Gen 1 Portable Hard Drive - Black

Western DigitalBest BuyHDD
4.7(42)

Capacity

12 TB

Price

$319.99

$/GB

$0.027

Check Price at Best Buy
8

Seagate Exos 7E8 Enterprise Capacity 3.5 HDD 8TB 7200 RPM SATA 6Gb/s 4Kn 256MB Cache 3.5-Inch Enterprise Hard Disk Drive ST8000NM0045 (Renewed)

SeagateAmazon

Capacity

8 TB

Price

$215.00

$/GB

$0.027

Check Price at Amazon
9

Seagate 8TB Terascale Enterprise HDD 7200RPM 256MB Cache SATA 6Gb/s 64MB Cache 3.5-Inch Internal Hard Drive (ST8000NC0002) (Renewed)

SeagateAmazon

Capacity

8 TB

Price

$219.50

$/GB

$0.027

Check Price at Amazon
10

WD - easystore 20TB External USB 3.0 Hard Drive - Black

Western DigitalBest Buy2yrHDD
4.6(282)

Capacity

20 TB

Price

$559.99

$/GB

$0.028

Check Price at Best Buy
11

WD - easystore 18TB External USB 3.0 Hard Drive - Black

Western DigitalBest Buy2yrHDD
4.5(753)

Capacity

18 TB

Price

$509.99

$/GB

$0.028

Check Price at Best Buy
12

Western Digital 14TB Elements Desktop External Hard Drive - USB 3.0

Western DigitalAmazonHDD

Capacity

14 TB

Price

$396.99

$/GB

$0.028

Check Price at Amazon
13

MDD MAXDIGITALDATA MDD (MDD8TSATA25672NAS) 8TB 7200RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal NAS Hard Drive (Renewed)

UnknownAmazon

Capacity

8 TB

Price

$229.99

$/GB

$0.029

Check Price at Amazon
14

MDD MAXDIGITALDATA MaxDigitalData 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal Enterprise Hard Drive (MD8000GSA25672E) - 3 Years Warranty (Renewed)

UnknownAmazon

Capacity

8 TB

Price

$229.99

$/GB

$0.029

Check Price at Amazon
15

Seagate Exos 7E8 8TB 512e SATA 256MB Cache 3.5-Inch Enterprise Hard Drive (ST8000NM0055) (Renewed)

SeagateAmazon

Capacity

8 TB

Price

$230.00

$/GB

$0.029

Check Price at Amazon
16

Western Digital 14TB Elements Desktop External Hard Drive - USB 3.0

Western DigitalAmazonHDD

Capacity

14 TB

Price

$409.99

$/GB

$0.029

Check Price at Amazon
17

Seagate Expansion 8TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP8000400)

SeagateAmazon2yrHDD

Capacity

8 TB

Price

$238.52

$/GB

$0.030

Check Price at Amazon
18

MDD MAXDIGITALDATA MaxDigitalData 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal Enterprise Hard Drive (MD8000GSA25672E) - 3 Years Warranty (Renewed)

UnknownAmazon

Capacity

8 TB

Price

$239.95

$/GB

$0.030

Check Price at Amazon
19

HGST Ultrastar 7K6000 HUS726060ALE610 (0F23001) 6TB 7200 RPM 128MB Cache SATA 6.0Gbps 3.5in Enterprise Hard Drive - 5 Year Warranty (Renewed),Mechanical Hard Disk

HGSTAmazon

Capacity

6 TB

Price

$179.99

$/GB

$0.030

Check Price at Amazon
20

MDD MAXDIGITALDATA 6TB 7200RPM 128MB Cache SATA 6.0Gb/s 3.5-inch Internal Hard Drive (Enterprise Grade) (Renewed)

UnknownAmazon

Capacity

6 TB

Price

$179.99

$/GB

$0.030

Check Price at Amazon
21

HGST Ultrastar 7K6000 HUS726040ALE610 (0F23005) 4 TB 7200 RPM SATA 6Gb/s 3.5-Inch Internal Hard Drive (Renewed)

HGSTAmazon

Capacity

4 TB

Price

$119.99

$/GB

$0.030

Check Price at Amazon
22

MDD MAXDIGITALDATA MaxDigitalData 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal Enterprise Hard Drive (MD8000GSA25672E) - 3 Years Warranty (Renewed)

UnknownAmazon

Capacity

8 TB

Price

$119.99

$/GB

$0.030

Check Price at Amazon
23

MDD MAXDIGITALDATA (MD6TB6472E) 6TB 7200RPM 64MB Cache SATA 6.0Gb/s 3.5'' Helium Platform Enterprise Hard Drive - w/3 Year Warranty (Renewed)

UnknownAmazon

Capacity

6 TB

Price

$179.99

$/GB

$0.030

Check Price at Amazon
24

Western Digital 8TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Backup Software - WDBBGB0080HBK-NESN

Western DigitalAmazonHDD

Capacity

8 TB

Price

$239.99

$/GB

$0.030

Check Price at Amazon
25

Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ

Western DigitalAmazon2yrHDD

Capacity

8 TB

Price

$239.99

$/GB

$0.030

Check Price at Amazon
26

MDD MAXDIGITALDATA MDD (MDD8TSATA25672NAS) 8TB 7200RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal NAS Hard Drive (Renewed)

UnknownAmazon

Capacity

8 TB

Price

$239.99

$/GB

$0.030

Check Price at Amazon
27

Seagate Exos 7E8 8TB Enterprise Capacity HDD7200 RPM 256MB Cache SATA 6 Gb/s Interface, 3.5inch Internal Hard Drive - ST8000NM0055 (Renewed)

SeagateAmazon

Capacity

8 TB

Price

$239.99

$/GB

$0.030

Check Price at Amazon
28

Western Digital 12TB WD Blue Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD120EAGZ

Western DigitalAmazon2yrHDD

Capacity

12 TB

Price

$364.99

$/GB

$0.030

Check Price at Amazon
29

Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX

Western DigitalAmazonHDD

Capacity

16 TB

Price

$494.99

$/GB

$0.031

Check Price at Amazon
30

Seagate 8TB 3.5" Expansion Desktop USB 3.0 External Hard Drive

SeagateAmazonHDD

Capacity

8 TB

Price

$249.61

$/GB

$0.031

Check Price at Amazon
31

MDD MAXDIGITALDATA 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal Hard Drive for Surveillance (MD8000GSA25672DVR) (Renewed)

UnknownAmazon

Capacity

8 TB

Price

$249.95

$/GB

$0.031

Check Price at Amazon
32

Seagate - Expansion Desktop 8TB HDD - Black

SeagateBest Buy1yrHDD
4.6(177)

Capacity

8 TB

Price

$249.99

$/GB

$0.031

Check Price at Best Buy
33

Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD120EFGX

Western DigitalAmazonHDD

Capacity

12 TB

Price

$374.99

$/GB

$0.031

Check Price at Amazon
34

MDD 8TB 7200RPM 128MB Cache SATA 6Gb/s 3.5-inch Internal Hard Drive (for Surveillance Storage) (Renewed)

UnknownAmazon

Capacity

8 TB

Price

$249.99

$/GB

$0.031

Check Price at Amazon
35

MDD - HGST Ultrastar (HUS726060ALE610) 6TB 7200RPM 128MB Cache SATA 6Gb/s 3.5-inch Enterprise Hard Drive (for NAS, Desktop PC, Surveillance Storage) - 5 Year Warranty (Renewed)

HGSTAmazon

Capacity

6 TB

Price

$189.99

$/GB

$0.032

Check Price at Amazon
36

MDD MAXDIGITALDATA MaxDigitalData 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal Enterprise Hard Drive (MD8000GSA25672E) - 3 Years Warranty (Renewed)

UnknownAmazon

Capacity

8 TB

Price

$189.99

$/GB

$0.032

Check Price at Amazon
37

Western Digital 12TB Elements Desktop External Hard Drive, USB 3.0 external hard drive for plug-and-play storage - Western DigitalBWLG0120HBK-NESN

Western DigitalAmazon

Capacity

12 TB

Price

$379.99

$/GB

$0.032

Check Price at Amazon
38

Seagate - Game Drive for Xbox 5TB External USB 3.2 Gen 1 Portable Hard Drive Xbox Certified with Green LED Bar - Black

SeagateBest BuyHDD
4.5(77)

Capacity

5 TB

Price

$159.99

$/GB

$0.032

Check Price at Best Buy
39

Seagate - Astro Bot Limited Edition Game Drive for PlayStation 5TB External USB 3.2 Gen 1 Portable Hard Drive - White

SeagateBest BuyHDD
5.0(2)

Capacity

5 TB

Price

$159.99

$/GB

$0.032

Check Price at Best Buy
40

Seagate 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)

SeagateAmazonHDD

Capacity

8 TB

Price

$258.45

$/GB

$0.032

Check Price at Amazon
41

Dell/Seagate Exos 7E10 ST8000NM023B 8TB 7200 RPM SATA 6Gb/s 512e 3.5in Enterprise Hard Drive

SeagateAmazon

Capacity

8 TB

Price

$259.00

$/GB

$0.032

Check Price at Amazon
42

WD - Blue 4TB PC Internal Hard Drive for Desktops

Western DigitalBest Buy2yrHDD
180 / 180MB/s

Capacity

4 TB

Price

$129.99

$/GB

$0.032

Check Price at Best Buy
43

WL 4TB 64MB Cache 5400RPM SATA III (6.0Gb/s) 3.5" Internal Surveillance DVR Hard Drive - w/ 1 Year Warranty

GoHardDriveAmazonHDD

Capacity

4 TB

Price

$129.99

$/GB

$0.032

Check Price at Amazon
44

MDD MAXDIGITALDATA MaxDigitalData 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal Enterprise Hard Drive (MD8000GSA25672E) - 3 Years Warranty (Renewed)

UnknownAmazon

Capacity

8 TB

Price

$129.99

$/GB

$0.032

Check Price at Amazon
45

Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 128 MB Cache, 3.5" - WD40EZZX

Western DigitalAmazonHDD

Capacity

4 TB

Price

$129.99

$/GB

$0.032

Check Price at Amazon
46

WD 16TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Backup Software - WDBBGB0160HBK-NESN

Western DigitalAmazonHDD

Capacity

16 TB

Price

$519.99

$/GB

$0.032

Check Price at Amazon
47

Seagate - Seagate One Touch Desktop HDD 8 TB - Space Gray

SeagateBest Buy2yrHDD

Capacity

8 TB

Price

$259.99

$/GB

$0.032

Check Price at Best Buy
48

Seagate One Touch 8TB External Hard Drive Desktop HDD - USB-C Compatible with Most Windows and macOS, Rescue Recovery (STNB8000400)

SeagateAmazon

Capacity

8 TB

Price

$259.99

$/GB

$0.032

Check Price at Amazon
49

WD - Purple 8TB Surveillance Internal Hard Drive

Western DigitalBest Buy3yrHDD
4.3(11)
215 / 215MB/s

Capacity

8 TB

Price

$259.99

$/GB

$0.032

Check Price at Best Buy
50

WD 14TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Backup Software - WDBBGB0140HBK-NESN

Western DigitalAmazonHDD

Capacity

14 TB

Price

$459.99

$/GB

$0.033

Check Price at Amazon
51

WD - BLACK P10 Game Drive for Xbox 5TB External USB 3.2 Gen 1 Portable Hard Drive - Black With White Trim

Western DigitalBest BuyHDD
4.7(473)

Capacity

5 TB

Price

$164.99

$/GB

$0.033

Check Price at Best Buy
52

Western Digital 10TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD100EFGX

Western DigitalAmazonHDD

Capacity

10 TB

Price

$329.99

$/GB

$0.033

Check Price at Amazon
53

Dell 8TB 7.2K RPM SATA 6Gb/s 512e 3.5in Enterprise PowerEdge Hard Drive for R440 R750 R450 T150 R470 T560 T40 R250 R740 R640 T550 T350 R540 R840 ME4024 R650XS R350 R340 J7W80 G16

DellAmazon3yrHDD

Capacity

8 TB

Price

$264.64

$/GB

$0.033

Check Price at Amazon
54

MaxDigitalData 6TB 7200RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive for Surveillance (MD6000GSA12872DVR) - 3 Years Warranty

MDD MAXDIGITALDATAAmazon3yrHDD

Capacity

6 TB

Price

$198.99

$/GB

$0.033

Check Price at Amazon
55

MaxDigitalData 6TB 7200RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive for Surveillance (MD6000GSA12872DVR) - 3 Years Warranty

MDD MAXDIGITALDATAAmazon3yrHDD

Capacity

6 TB

Price

$198.99

$/GB

$0.033

Check Price at Amazon
56

Seagate Enterprise Capacity 3.5 HDD 6TB 7200 RPM 512e SATA 6Gb/s 128MB-Cache 3.5-Inch Hard Disk Drive - ST6000NM0024 (Renewed)

SeagateAmazon

Capacity

6 TB

Price

$199.99

$/GB

$0.033

Check Price at Amazon
57

Western Digital 6TB Ultrastar DC HC310 7200 RPM SATA 6.0Gb/s 3.5" Data Center Internal Hard Drive Model 0B36039 (Renewed)

Western DigitalAmazon

Capacity

6 TB

Price

$199.99

$/GB

$0.033

Check Price at Amazon
58

Seagate - IronWolf Pro 20TB NAS Internal Hard Drive with Rescue Data Recovery Services

SeagateBest Buy5yrHDD
4.7(30)
285 / 285MB/s

Capacity

20 TB

Price

$669.99

$/GB

$0.034

Check Price at Best Buy
59

WD Western Digital 8TB WD_Black Performance Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD8002FZBX

Western DigitalAmazon5yrHDD

Capacity

8 TB

Price

$272.99

$/GB

$0.034

Check Price at Amazon
60

Seagate IronWolf 12TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage (ST12000VNZ008/ST12000VN0008)

SeagateAmazon3yrHDD

Capacity

12 TB

Price

$410.87

$/GB

$0.034

Check Price at Amazon
61

Seagate Exos 7E8 4TB 512n SATA 128MB Cache 3.5-Inch Enterprise Hard Drive - Frustration Free Packaging (ST4000NM0035) (Certified Refurbished)

SeagateAmazon

Capacity

4 TB

Price

$139.99

$/GB

$0.035

Check Price at Amazon
62

WD - Purple 4TB Surveillance Internal Hard Drive

Western DigitalBest Buy3yrHDD
4.8(82)
180 / 180MB/s

Capacity

4 TB

Price

$139.99

$/GB

$0.035

Check Price at Best Buy
63

MDD 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 MAXDIGITALDATAAmazon3yrHDD

Capacity

4 TB

Price

$139.99

$/GB

$0.035

Check Price at Amazon
64

Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" -WD40EFPX

Western DigitalAmazonHDD90d low

Capacity

4 TB

Price

$139.99

$/GB

$0.035

Check Price at Amazon
65

WD - easystore 8TB External USB 3.0 Hard Drive - Black

Western DigitalBest Buy2yrHDD
4.7(7,220)

Capacity

8 TB

Price

$279.99

$/GB

$0.035

Check Price at Best Buy
66

Seagate - Barracuda 8TB Internal Hard Drive for Desktops

SeagateBest Buy2yrHDD
4.6(418)
190 / 190MB/s

Capacity

8 TB

Price

$279.99

$/GB

$0.035

Check Price at Best Buy
67

WD 44TB My Book Duo Desktop RAID External Hard Drive HDD, USB 3.1, With Password Protection and Auto Backup Software - WDBFBE0440JBK-NESN

Western DigitalAmazon3yrHDD

Capacity

44 TB

Price

$1569.99

$/GB

$0.036

Check Price at Amazon
68

WD - Easystore 6TB External USB 3.2 Gen 1 Portable Hard Drive - Black

Western DigitalBest Buy2yrHDD
4.6(111)

Capacity

6 TB

Price

$214.99

$/GB

$0.036

Check Price at Best Buy
69

WD 6TB Elements Portable External Hard Drive for Windows, USB 3.2 Gen 1/USB 3.0 for PC & Mac, Plug and Play Ready - WDBHJS0060BBK-WESN

Western DigitalAmazon2yrHDD

Capacity

6 TB

Price

$214.99

$/GB

$0.036

Check Price at Amazon
70

Seagate - IronWolf Pro 24TB NAS Internal Hard Drive with Rescue Data Recovery Services

SeagateBest Buy5yrHDD
4.5(8)
285 / 285MB/s

Capacity

24 TB

Price

$859.99

$/GB

$0.036

Check Price at Best Buy
71

Seagate Game Drive for PlayStation® Consoles 5 TB External Hard Drive - USB 3.2 Gen 1, Officially-License (STLV5000100)

SeagateAmazon3yrHDD

Capacity

5 TB

Price

$179.99

$/GB

$0.036

Check Price at Amazon
72

ADATA HD710 Pro 5TB External Hard Drive (AHD710P-5TU31-CBK)

ADATAAmazon3yrHDD

Capacity

5 TB

Price

$179.99

$/GB

$0.036

Check Price at Amazon
73

Seagate Game Drive for Xbox 5 TB External Hard Drive Portable HDD - USB 3.2 Gen 1, Black with Built-in Green LED bar, Xbox Certified, 3 Year Rescue Services(STKX5000403)

SeagateAmazon1yrHDD

Capacity

5 TB

Price

$179.99

$/GB

$0.036

Check Price at Amazon
74

Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD40EZAX

Western DigitalAmazon2yrHDD

Capacity

4 TB

Price

$144.99

$/GB

$0.036

Check Price at Amazon
75

Seagate - IronWolf Pro 16TB NAS Internal Hard Drive with Rescue Data Recovery Services

SeagateBest Buy5yrHDD
4.5(34)
270 / 270MB/s

Capacity

16 TB

Price

$579.99

$/GB

$0.036

Check Price at Best Buy
76

Seagate IronWolf Pro 28TB Enterprise NAS Internal HDD Hard Drive – CMR 3.5 Inch SATA 6Gb/s 7200 RPM 512MB Cache for RAID Network Attached Storage, Rescue Services (ST28000NT000)

SeagateAmazon5yrHDD

Capacity

28 TB

Price

$1019.99

$/GB

$0.036

Check Price at Amazon
77

WL 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 labelAmazonHDD

Capacity

3 TB

Price

$109.99

$/GB

$0.037

Check Price at Amazon
78

WD - Easystore 5TB External USB 3.2 Gen 1 Portable Hard Drive - Black

Western DigitalBest Buy2yrHDD
4.7(11,991)

Capacity

5 TB

Price

$184.99

$/GB

$0.037

Check Price at Best Buy
79

Seagate 4TB Enterprise Capacity SAS 12Gb s 512n 3.5" Internal Hard Drive Model ST4000NM0025

SeagateAmazonHDD

Capacity

4 TB

Price

$149.00

$/GB

$0.037

Check Price at Amazon
80

Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004

SeagateAmazon2yrHDD

Capacity

4 TB

Price

$149.99

$/GB

$0.037

Check Price at Amazon
81

Seagate 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)

SeagateAmazon3yrHDD

Capacity

4 TB

Price

$149.99

$/GB

$0.037

Check Price at Amazon
82

WD - D10 8TB External USB 3.2 Gen 1 Portable Hard Drive - Black

Western DigitalBest Buy3yrHDD
4.7(977)
250 / 250MB/s

Capacity

8 TB

Price

$299.99

$/GB

$0.037

Check Price at Best Buy
83

Seagate IronWolf 8TB NAS Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage – Frustration Free Packaging (ST8000VNZ04/N004)

SeagateAmazon3yrHDD

Capacity

8 TB

Price

$299.99

$/GB

$0.037

Check Price at Amazon
84

Seagate Skyhawk AI 8TB Video Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with in-house Rescue Services (ST8000VEZ01)

SeagateAmazonHDD90d low

Capacity

8 TB

Price

$299.99

$/GB

$0.037

Check Price at Amazon
85

WD Western Digital 10TB WD_Black Performance Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD102FZBX

Western DigitalAmazon5yrHDD

Capacity

10 TB

Price

$374.99

$/GB

$0.037

Check Price at Amazon
86

Seagate Portable 5TB External Hard Drive HDD – USB 3.0 for PC, Mac, PS4, & Xbox - 1-Year Rescue Service (STGX5000400), Black

SeagateAmazon2yrHDD

Capacity

5 TB

Price

$188.99

$/GB

$0.038

Check Price at Amazon
87

Seagate - Expansion 5TB External USB 3.0 Portable Hard Drive with Rescue Data Recovery Services - Black

SeagateBest Buy1yrHDD
4.8(285)

Capacity

5 TB

Price

$189.99

$/GB

$0.038

Check Price at Best Buy
88

WD - BLACK 6TB Gaming Internal Hard Drive

Western DigitalBest Buy5yrHDD
4.6(54)
256 / 256MB/s

Capacity

6 TB

Price

$229.99

$/GB

$0.038

Check Price at Best Buy
89

Seagate IronWolf Pro, 12 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage (ST12000NT001)

SeagateBest Buy5yrHDD
285 / 285MB/s

Capacity

12 TB

Price

$459.99

$/GB

$0.038

Check Price at Best Buy
90

Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ

Western DigitalAmazonHDD23% this week

Capacity

4 TB

Price

$154.99

$/GB

$0.039

Check Price at Amazon
91

WD - Purple 4TB Surveillance Internal Hard Drive

Western DigitalBest Buy3yrHDD
4.5(2)
180 / 180MB/s

Capacity

4 TB

Price

$154.99

$/GB

$0.039

Check Price at Best Buy
92

WD - My Passport 5TB External USB 3.0 Portable Hard Drive - Black

Western DigitalBest Buy3yrHDD
4.7(2,888)

Capacity

5 TB

Price

$194.99

$/GB

$0.039

Check Price at Best Buy
93

WD 5TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0050BBK-WESN

Western DigitalAmazonHDD

Capacity

5 TB

Price

$194.99

$/GB

$0.039

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94

Seagate BarraCuda 5TB Internal Hard Drive HDD – 2.5 Inch SATA 6Gb/s 5400 RPM 128MB Cache for Computer Desktop PC (ST5000LM000)

SeagateAmazonHDD

Capacity

5 TB

Price

$197.00

$/GB

$0.039

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95

Seagate BarraCuda 6TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s 5400 RPM 256MB Cache for Computer Desktop PC – Frustration Free Packaging (ST6000DMZ03)

SeagateAmazonHDD

Capacity

6 TB

Price

$237.90

$/GB

$0.040

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96

Seagate Portable 4TB External Hard Drive HDD – USB 3.0 for PC, Mac, Xbox, & PlayStation - 1-Year Rescue Service (SRD0NF1)

SeagateAmazon1yrHDD

Capacity

4 TB

Price

$159.00

$/GB

$0.040

Check Price at Amazon
97

Western Digital 6TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" -WD60EFPX

Western DigitalAmazon3yrHDD

Capacity

6 TB

Price

$238.78

$/GB

$0.040

Check Price at Amazon
98

WD - P10 5TB External USB 3.2 Gen 1 Portable Hard Drive - Black

Western DigitalBest Buy3yrHDD
4.8(472)
140 / 140MB/s

Capacity

5 TB

Price

$199.99

$/GB

$0.040

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99

WD - My Cloud Home 4TB Personal Cloud - White

Western DigitalBest Buy2yrHDD
4.0(1,469)

Capacity

4 TB

Price

$159.99

$/GB

$0.040

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100

Seagate - Game Drive for PlayStation Consoles 5TB External USB 3.2 Gen 1 Portable Hard Drive with Blue LED Lighting - White

SeagateBest Buy3yrHDD
4.6(514)

Capacity

5 TB

Price

$199.99

$/GB

$0.040

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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 363+ HDDs ranked by price per gigabyte — the only metric that truly shows you which drives offer the best value for your money.

Right now, the cheapest HDD storage starts at just $0.015/GB, while the average across all drives is $0.033/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?

TypeTypical $/GBMax CapacityBest For
3.5" Desktop HDD$0.015–0.02520TB+Desktop PC, NAS, media server
2.5" Laptop HDD$0.025–0.0455TBLaptop upgrade, portable use
External HDD$0.020–0.04020TB+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 $0.0150/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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