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 $0.0228/GB — a Western Digital Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD120EFGX (12 TB) available at Amazon for $273.38. BuyPerUnit tracks 349 hard drives (hdd) products across Amazon, Best Buy, and Newegg, updated daily. The average price is $0.1649/GB.
Ranked by:$/GB
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1

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 DigitalAmazonHDD86% below avg

Capacity

12 TB

Price

$273.38

$/GB

$0.023

Check Price at Amazon
2

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

Western DigitalAmazon2yrHDD83% below avg

Capacity

12 TB

Price

$344.15

$/GB

$0.029

Check Price at Amazon
3

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

Western DigitalAmazon2yrHDD82% below avg

Capacity

8 TB

Price

$239.99

$/GB

$0.030

Check Price at Amazon
4

WD - Blue 8TB PC Internal Hard Drive for Desktops

Western DigitalBest Buy2yrHDD
4.2(18)
215 / 215MB/s
82% below avg

Capacity

8 TB

Price

$239.99

$/GB

$0.030

Check Price at Best Buy
5

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 DigitalAmazonHDD82% below avg

Capacity

10 TB

Price

$299.99

$/GB

$0.030

Check Price at Amazon
6

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 DigitalAmazonHDD81% below avg

Capacity

16 TB

Price

$494.99

$/GB

$0.031

Check Price at Amazon
7

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)

SeagateAmazonHDD80% below avg

Capacity

8 TB

Price

$259.97

$/GB

$0.032

Check Price at Amazon
8

WD - Blue 4TB PC Internal Hard Drive for Desktops

Western DigitalBest Buy2yrHDD
180 / 180MB/s
80% below avg

Capacity

4 TB

Price

$129.99

$/GB

$0.032

Check Price at Best Buy
9

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

GoHardDriveAmazonHDD80% below avg

Capacity

4 TB

Price

$129.99

$/GB

$0.032

Check Price at Amazon
10

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

Western DigitalAmazonHDD80% below avg

Capacity

4 TB

Price

$129.99

$/GB

$0.032

Check Price at Amazon
11

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

SeagateBest Buy2yrHDD80% below avg

Capacity

8 TB

Price

$259.99

$/GB

$0.032

Check Price at Best Buy
12

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

DellAmazon3yrHDD80% below avg

Capacity

8 TB

Price

$264.64

$/GB

$0.033

Check Price at Amazon
13

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

MDD MAXDIGITALDATAAmazon3yrHDD80% below avg

Capacity

6 TB

Price

$198.99

$/GB

$0.033

Check Price at Amazon
14

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

MDD MAXDIGITALDATAAmazon3yrHDD80% below avg

Capacity

6 TB

Price

$198.99

$/GB

$0.033

Check Price at Amazon
15

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

SeagateBest Buy5yrHDD
4.7(30)
285 / 285MB/s
80% below avg

Capacity

20 TB

Price

$669.99

$/GB

$0.034

Check Price at Best Buy
16

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)

SeagateAmazon3yrHDD79% below avg

Capacity

12 TB

Price

$410.87

$/GB

$0.034

Check Price at Amazon
17

WD - Purple 4TB Surveillance Internal Hard Drive

Western DigitalBest Buy3yrHDD
4.5(2)
180 / 180MB/s
79% below avg

Capacity

4 TB

Price

$139.99

$/GB

$0.035

Check Price at Best Buy
18

WD - Purple 4TB Surveillance Internal Hard Drive

Western DigitalBest Buy3yrHDD
4.8(82)
180 / 180MB/s
79% below avg

Capacity

4 TB

Price

$139.99

$/GB

$0.035

Check Price at Best Buy
19

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 MAXDIGITALDATAAmazon3yrHDD79% below avg

Capacity

4 TB

Price

$139.99

$/GB

$0.035

Check Price at Amazon
20

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
21

Seagate - Barracuda 8TB Internal Hard Drive for Desktops

SeagateBest Buy2yrHDD
4.6(417)
190 / 190MB/s
79% below avg

Capacity

8 TB

Price

$279.99

$/GB

$0.035

Check Price at Best Buy
22

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

SeagateBest Buy5yrHDD
4.5(8)
285 / 285MB/s
78% below avg

Capacity

24 TB

Price

$859.99

$/GB

$0.036

Check Price at Best Buy
23

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

Western DigitalAmazon2yrHDD78% below avg

Capacity

4 TB

Price

$144.99

$/GB

$0.036

Check Price at Amazon
24

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

SeagateBest Buy5yrHDD
4.5(34)
270 / 270MB/s
78% below avg

Capacity

16 TB

Price

$579.99

$/GB

$0.036

Check Price at Best Buy
25

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)

SeagateAmazon5yrHDD78% below avg

Capacity

28 TB

Price

$1019.99

$/GB

$0.036

Check Price at Amazon
26

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 labelAmazonHDD78% below avg

Capacity

3 TB

Price

$109.99

$/GB

$0.037

Check Price at Amazon
27

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

SeagateAmazon2yrHDD77% below avg

Capacity

4 TB

Price

$149.99

$/GB

$0.037

Check Price at Amazon
28

Seagate - Barracuda 4TB Internal Hard Drive for Desktops

SeagateBest Buy2yrHDD
4.7(302)
190 / 190MB/s
77% below avg

Capacity

4 TB

Price

$149.99

$/GB

$0.037

Check Price at Best Buy
29

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)

SeagateAmazon3yrHDD77% below avg

Capacity

4 TB

Price

$149.99

$/GB

$0.037

Check Price at Amazon
30

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

Western DigitalAmazon5yrHDD77% below avg

Capacity

10 TB

Price

$374.99

$/GB

$0.037

Check Price at Amazon
31

WD - BLACK 6TB Gaming Internal Hard Drive

Western DigitalBest Buy5yrHDD
4.6(54)
256 / 256MB/s
77% below avg

Capacity

6 TB

Price

$229.99

$/GB

$0.038

Check Price at Best Buy
32

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
77% below avg

Capacity

12 TB

Price

$459.99

$/GB

$0.038

Check Price at Best Buy
33

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)

SeagateAmazonHDD76% below avg

Capacity

6 TB

Price

$237.90

$/GB

$0.040

Check Price at Amazon
34

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 DigitalAmazon3yrHDD76% below avg

Capacity

6 TB

Price

$238.78

$/GB

$0.040

Check Price at Amazon
35

Western Digital 6TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD64PURZ

Western DigitalAmazon3yrHDD74% below avg

Capacity

6 TB

Price

$253.27

$/GB

$0.042

Check Price at Amazon
36

WL 2TB 64MB Cache 5400RPM SATA III (6.0Gb/s) 3.5" Internal Surveillance DVR Hard Drive - w/ 1 Year Warranty

GoHardDriveAmazonHDD74% below avg

Capacity

2 TB

Price

$84.95

$/GB

$0.042

Check Price at Amazon
37

Seagate 4TB BarraCuda SATA 6Gb/s 256MB Cache 3.5-Inch Internal Hard Drive (ST4000DM004) Single Pack,Mechanical Hard Disk

SeagateAmazonHDD74% below avg

Capacity

4 TB

Price

$169.93

$/GB

$0.042

Check Price at Amazon
38

Seagate IronWolf 4TB NAS Internal Hard Drive CMR 3.5 Inch SATA 6Gb/s 5400 RPM 64MB Cache for RAID Network Attached Storage Rescue Services (ST4000VNZ06/006)

SeagateAmazonHDD74% below avg

Capacity

4 TB

Price

$169.99

$/GB

$0.042

Check Price at Amazon
39

Seagate Constellation ES.3 ST4000NM0033 4 TB Hard Drive - 3.5 Internal - SATA

SeagateAmazonHDD74% below avg

Capacity

4 TB

Price

$170.00

$/GB

$0.043

Check Price at Amazon
40

WL 3TB 7200RPM 64MB Cache SATA 6.0Gb/s 3.5" Desktop Hard Drive (For Server, RAID, NAS, DVR, Desktop PC) w/1 Year Warranty

white labelAmazonHDD74% below avg

Capacity

3 TB

Price

$129.99

$/GB

$0.043

Check Price at Amazon
41

Seagate Exos X18 ST10000NM018G 10 TB Hard Drive - Internal - SATA (SATA-600) - Conventional Magnetic Recording (CMR) Method

SeagateNeweggHDD74% below avg

Capacity

10TB

Price

$434.45

$/GB

$0.043

Check Price at Newegg
42

Seagate BarraCuda 2TB Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache – Frustration Free Packaging (ST2000DM008/ST2000DMZ08)

SeagateAmazonHDD73% below avg

Capacity

2 TB

Price

$87.48

$/GB

$0.044

Check Price at Amazon
43

Western Digital 2TB WD Blue PC Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD20EZBX

Western DigitalAmazon2yrHDD73% below avg

Capacity

2 TB

Price

$88.99

$/GB

$0.044

Check Price at Amazon
44

Buffalo 8 TB Hard Drive - Internal - TAA Compliant

BuffaloNeweggHDD73% below avg

Capacity

8TB

Price

$358.22

$/GB

$0.045

Check Price at Newegg
45

Seagate IronWolf Pro, 4 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage (ST4000NT001)

SeagateAmazonHDD90d low

Capacity

4 TB

Price

$189.99

$/GB

$0.047

Check Price at Amazon
46

Western Digital 8TB WD Red Plus NAS Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" - WD80EFPX

Western DigitalAmazonHDD71% below avg

Capacity

8 TB

Price

$380.00

$/GB

$0.048

Check Price at Amazon
47

Seagate 4 TB 3.5" Internal Hard Drive

SeagateAmazonHDD70% below avg

Capacity

4 TB

Price

$195.00

$/GB

$0.049

Check Price at Amazon
48

2TB 7.2K SATA 3.5 inch DS4243 00V768 Hard Drive X306A-R5

2TBNeweggHDD70% below avg

Capacity

2TB

Price

$98.49

$/GB

$0.049

Check Price at Newegg
49

apricorn aegis padlock 16 tb fips 1402 validated 256bit encrypted hard drive adt3pl256f16tb

ApricornNeweggHDD70% below avg

Capacity

16TB

Price

$798.99

$/GB

$0.050

Check Price at Newegg
50

Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD84PURZ

Western DigitalAmazonHDD70% below avg

Capacity

8 TB

Price

$399.99

$/GB

$0.050

Check Price at Amazon
51

Western Digital 3TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD30EFRX

Western DigitalAmazonHDD70% below avg

Capacity

3 TB

Price

$150.00

$/GB

$0.050

Check Price at Amazon
52

Seagate 1TB Desktop HDD Hard Drive - Internal (ST1000DM003)

SeagateAmazon2yrHDD90d low

Capacity

1 TB

Price

$51.32

$/GB

$0.051

Check Price at Amazon
53

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

Western DigitalAmazonHDD69% below avg

Capacity

4 TB

Price

$205.99

$/GB

$0.051

Check Price at Amazon
54

Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ

Western DigitalAmazonHDD68% below avg

Capacity

3 TB

Price

$160.00

$/GB

$0.053

Check Price at Amazon
55

Constellation ES ST1000NM0011 1 TB Internal Hard Drive

SeagateAmazonHDD64% below avg

Capacity

1 TB

Price

$59.00

$/GB

$0.059

Check Price at Amazon
56

656108 MM1000GFJTE 832510-001 ST1000NX0423 1TB SATA Hard Drive

656108NeweggHDD64% below avg

Capacity

1TB

Price

$59.01

$/GB

$0.059

Check Price at Newegg
57

MDD MAXDIGITALDATA 500GB 5900RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Surveillance Hard Drive - 3 Year Warranty

MDD MAXDIGITALDATAAmazon3yrHDD64% below avg

Capacity

500 GB

Price

$29.99

$/GB

$0.060

Check Price at Amazon
58

Seagate - Barracuda 2TB Internal Hard Drive for Desktops

SeagateBest Buy2yrHDD
4.7(1,165)
220 / 220MB/s
64% below avg

Capacity

2 TB

Price

$119.99

$/GB

$0.060

Check Price at Best Buy
59

Seagate 4 TB 3.5" Internal Hard Drive

SeagateAmazonHDD64% below avg

Capacity

4 TB

Price

$240.00

$/GB

$0.060

Check Price at Amazon
60

S5500T S5600T S3900 Hard Drive 0235G6X4 2TB SATA

NeweggHDD63% below avg

Capacity

2TB

Price

$121.40

$/GB

$0.061

Check Price at Newegg
61

Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD23PURZ

Western DigitalAmazon3yrHDD62% below avg

Capacity

2 TB

Price

$124.99

$/GB

$0.062

Check Price at Amazon
62

Western Digital 8TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" - WD8005FFBX

Western DigitalAmazon5yrHDD62% below avg

Capacity

8 TB

Price

$499.99

$/GB

$0.062

Check Price at Amazon
63

Toshiba DT01ACA050 3.5 Inch SATA III Internal Hard Drive 500GB 7200RPM

TOSHIBAAmazonHDD61% below avg

Capacity

500 GB

Price

$31.88

$/GB

$0.064

Check Price at Amazon
64

HGST Deskstar E7K1000 HDE721010SLA330 1 TB 3.5' Internal Hard Drive - SATA - 7200rpm - 32 MB Buffer - Hot Swappable DISC PROD SPCL SOURCING SEE...

HGSTNeweggHDD61% below avg

Capacity

1TB

Price

$65.00

$/GB

$0.065

Check Price at Newegg
65

FOR ES.3 2TB Hard Drive SATA 6Gbps 7.2k 3.5 ST2000NM0033 55FX5

FORNeweggHDD58% below avg

Capacity

2TB

Price

$137.32

$/GB

$0.069

Check Price at Newegg
66

(Old Model) Seagate 1TB Desktop HDD Sata 6Gb/s 64MB Cache 3.5-Inch Internal Bare Drive (ST1000DM003)

SeagateAmazon2yrHDD58% below avg

Capacity

1 TB

Price

$70.00

$/GB

$0.070

Check Price at Amazon
67

Wd Blue Wd10ezex 1 Tb 3.5 Internal Hard Drive - Sata - 7200 RPM - 64

Western DigitalAmazonHDD56% below avg

Capacity

1 TB

Price

$72.99

$/GB

$0.073

Check Price at Amazon
68

Western Digital 2TB WD Blue PC Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, , 64 MB Cache, 3.5" - WD20EZRZ

Western DigitalAmazonHDD56% below avg

Capacity

2 TB

Price

$145.99

$/GB

$0.073

Check Price at Amazon
69

Buffalo OP-HD4.0BN/B Op-Hdb/B Series - Hard Drive - 4 Tb - Internal - 3.5 Inch - Sata 6Gb/S - Nl - Rohs

BuffaloNeweggHDD53% below avg

Capacity

4TB

Price

$312.67

$/GB

$0.078

Check Price at Newegg
70

Western Digital 1TB 3.5" SATA HDD 7200RPM Internal Desktop Hard Drive for PC/Mac - OEM WD10EZEX 1 TB

Western DigitalAmazonHDD16% this week

Capacity

1 TB

Price

$84.00

$/GB

$0.084

Check Price at Amazon
71

Seagate Bare Drives BarraCuda 1TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s 7200 RPM 64MB Cache for Computer Desktop PC – Frustration Free Packaging ST1000DMZ10/DM010

SeagateAmazon2yrHDD47% below avg

Capacity

1 TB

Price

$86.99

$/GB

$0.087

Check Price at Amazon
72

WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 16MB Cache 3.5 Inch - WD5000AAKX

Western DigitalAmazonHDD18% this week

Capacity

500 GB

Price

$43.99

$/GB

$0.088

Check Price at Amazon
73

ST1000NM0033 Enterprise Mechanical Hard Drive 1TB 7.2k SATA 3.5' 128MB Hard drive

NeweggHDD46% below avg

Capacity

1TB

Price

$89.60

$/GB

$0.090

Check Price at Newegg
74

Seagate BarraCuda 1TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s 7200 RPM 64MB Cache for Computer Desktop PC (ST1000DM010)

SeagateAmazon1yrHDD45% below avg

Capacity

1 TB

Price

$90.00

$/GB

$0.090

Check Price at Amazon
75

WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 32MB Cache 3.5 Inch - WD5000AZLX

Western DigitalAmazon2yrHDD44% below avg

Capacity

500 GB

Price

$46.00

$/GB

$0.092

Check Price at Amazon
76

Western Digital(WD) BLUE Deskptop 1TB( 1Terabyte) 3.5"Hard Disk Drive, 5400~7200RPM, SATA3 ( 6.0GB/s), 64MB Cache, IDEAL for PC/Mac/CCTV/NAS/DVR/Raid and SATA Applications, 1YR Warranty (Blue)

Western DigitalAmazonHDD42% below avg

Capacity

1 TB

Price

$94.99

$/GB

$0.095

Check Price at Amazon
77

Western Digital 1TB WD Blue PC Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 64 MB Cache, 3.5" - WD10EZEX

Western DigitalAmazonHDD39% below avg

Capacity

1 TB

Price

$99.99

$/GB

$0.100

Check Price at Amazon
78

for 1pc ES.3 2TB Hard Drive SATA 6Gbps 7.2k 3.5 ST2000NM0033 55FX5

forNeweggHDD90d low

Capacity

2TB

Price

$203.60

$/GB

$0.102

Check Price at Newegg
79

HP 3 TB 3.5' Internal Hard Drive - SATA - 7200rpm - Hot Pluggable HDD - 861693-B21

HPNeweggHDD36% below avg

Capacity

3TB

Price

$315.00

$/GB

$0.105

Check Price at Newegg
80

Western Digital Blue WD5000AZLX 500GB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive

Western DigitalAmazonHDD30% below avg

Capacity

500 GB

Price

$58.00

$/GB

$0.116

Check Price at Amazon
81

454414-001 AG691A 1TB 7.2K 3.5 FATA FC Hard Drive with Mapping

454414-001NeweggHDD29% below avg

Capacity

1TB

Price

$116.82

$/GB

$0.117

Check Price at Newegg
82

For WD/Western Data WD2002FFSX Red Disk PRO Series Enterprise NAS Special Mechanical Hard Drive 2TB

Western DigitalNeweggHDD27% below avg

Capacity

2TB

Price

$241.00

$/GB

$0.120

Check Price at Newegg
83

for 1pc Suitable for 1pc ES.3 2TB Hard Drive SATA 6Gbps 7.2k 3.5 ST2000NM0033

forNeweggHDD90d low

Capacity

2TB

Price

$265.60

$/GB

$0.133

Check Price at Newegg
84

ES.3 2TB Hard Drive SATA 6Gbps 7.2k 3.5-inch ST2000NM0033 55FX5

ES.3NeweggHDD90d low

Capacity

2TB

Price

$290.60

$/GB

$0.145

Check Price at Newegg
85

'ThinkServer 500GB 7.2K 3.5 Enterprise Lenovo 500 GB 3.5' Internal Hard Drive - SATA - 7200 - Hot Swappable - 1 Pack'

NeweggHDD

Capacity

500GB

Price

$109.00

$/GB

$0.218

Check Price at Newegg
86

500GB ST3500630AV 7200 RPM PATA/IDE/EIDE 3.5' Hard Drive for PC CCTV DVR

NeweggHDD90d low

Capacity

500GB

Price

$137.60

$/GB

$0.275

Check Price at Newegg
87

Lenovo 1 TB RDX Technology Internal Hard Drive Cartridge

LenovoNeweggHDD

Capacity

1TB

Price

$279.00

$/GB

$0.279

Check Price at Newegg
88

Swann 8 Channel 960H Professional Security System with 1TB Hard Drive, 6 900TVL Cameras, and 82 Feet Night Vision (SWDVK-834506-CL)

Western DigitalNeweggHDD

Capacity

1TB

Price

$1199.99

$/GB

$1.200

Check Price at Newegg
89

SCSI Industrial Medical Hard Disk ST318437LW For 18GB 68Pin 7200RPM 3.5' Hard Drive Works ly Fast Ship

NeweggHDD

Capacity

18GB

Price

$145.32

$/GB

$8.073

Check Price at Newegg
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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 349+ 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 $0.023/GB, while the average across all drives is $0.165/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 $0.0228/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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