Hard Drives (HDD)

Ranked by price per gigabyte

Updated daily · No paid placements

As of June 2026, the cheapest hard drives (hdd) on BuyPerUnit costs $0.0168/GB — a Western Digital WD Elements 16TB USB 3.0 Desktop External Hard Drive Black (16TB) available at Newegg for $268.94. BuyPerUnit tracks 973 hard drives (hdd) products across Amazon, Best Buy, and Newegg, updated daily. The average price is $0.0330/GB.
Ranked by:$/GB
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1

WD Elements 16TB USB 3.0 Desktop External Hard Drive Black

Western DigitalNeweggHDD49% below avg

Capacity

16TB

Price

$268.94

$/GB

$0.017

Check Price at Newegg
2

Dell 6 TB 3.5' Internal Hard Drive

DellNeweggHDD90d low

Capacity

6TB

Price

$114.00

$/GB

$0.019

Check Price at Newegg
3

WD Elements 10TB USB 3.0 Desktop Hard Drive Black

Western DigitalNeweggHDD36% below avg

Capacity

10TB

Price

$209.51

$/GB

$0.021

Check Price at Newegg
4

Seagate One Touch 18TB USB 3.0 / USB Type-C Hard Drives - Desktop External Black

SeagateNeweggHDD33% below avg

Capacity

18TB

Price

$399.00

$/GB

$0.022

Check Price at Newegg
5

OSENTRiX GX100 14TB USB 3.2 Gen 2 USB-C External Hard Drive with USB Hub for Windows or MacOS Desktop PC/Laptop - 2 Year Warranty

OSENTRiXAmazon2yrHDD31% below avg

Capacity

14 TB

Price

$319.99

$/GB

$0.023

Check Price at Amazon
6

HGST HUS724030ALA640 (0F14689) 3TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5' Enterprisel Hard Drive Bare Drive

HGSTNeweggHDD28% below avg

Capacity

3TB

Price

$71.25

$/GB

$0.024

Check Price at Newegg
7

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

SeagateAmazon1yrHDD27% below avg

Capacity

22 TB

Price

$529.99

$/GB

$0.024

Check Price at Amazon
8

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

AvolusionAmazon2yrHDD26% below avg

Capacity

14 TB

Price

$339.99

$/GB

$0.024

Check Price at Amazon
9

seagate archive hdd 8tb sata 6gbps 128mb cache sata hard drive (st8000as0002)

SeagateNeweggHDD26% below avg

Capacity

8TB

Price

$195.00

$/GB

$0.024

Check Price at Newegg
10

Lenovo 4 TB 3.5' Internal Hard Drive

LenovoNeweggHDD25% below avg

Capacity

4TB

Price

$99.00

$/GB

$0.025

Check Price at Newegg
11

Toshiba 16TB X300 Performance 3.5' CMR Internal Hard Drive

ToshibaNeweggHDD24% below avg

Capacity

16TB

Price

$403.67

$/GB

$0.025

Check Price at Newegg
12

Toshiba N300 NAS - Hard drive - 16 TB - internal - 3.5' - SATA 6Gb/s - 7200 rpm - buffer: 512 MB

ToshibaNeweggHDD20% below avg

Capacity

16TB

Price

$420.90

$/GB

$0.026

Check Price at Newegg
13

WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE

Western DigitalNeweggHDD

Capacity

2TB

Price

$52.95

$/GB

$0.026

Check Price at Newegg
14

Avolusion PRO-T5 4TB USB 3.0 External Hard Drive for Windows & Mac OS (White) - 2 Year Warranty

AvolusionAmazon2yrHDD

Capacity

4 TB

Price

$109.99

$/GB

$0.027

Check Price at Amazon
15

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
16

Seagate Barracuda 24TB Internal Hard Drive, 7200 U/Min, 512MB Cache, SATA 6Gb/s, 3.5" (ST24000DM001)

SeagateAmazonHDD

Capacity

24 TB

Price

$699.95

$/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

$234.80

$/GB

$0.029

Check Price at Amazon
18

Toshiba 20TB X300 Performance 3.5' CMR Internal Hard Drive

ToshibaNeweggHDD

Capacity

20TB

Price

$598.99

$/GB

$0.030

Check Price at Newegg
19

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)

SeagateAmazonHDD14% this week

Capacity

8 TB

Price

$239.75

$/GB

$0.030

Check Price at Amazon
20

TOSHIBA DT01ACA300 3TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive Bare Drive

ToshibaNeweggHDD

Capacity

3TB

Price

$90.00

$/GB

$0.030

Check Price at Newegg
21

Novus 20TB External USB-C 7200RPM Rugged Hard Drive

NovusNeweggHDD

Capacity

20TB

Price

$619.00

$/GB

$0.031

Check Price at Newegg
22

MDD MAXDIGITALDATA MaxDigitalData 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5inch Internal Hard Drive for NAS Network Storage (MD8000GSA25672NAS)

MDD MAXDIGITALDATAAmazon3yr

Capacity

8 TB

Price

$248.95

$/GB

$0.031

Check Price at Amazon
23

Seagate BarraCuda Internal Hard Drive 8TB SATA 6Gb/s 256MB Cache 3.5-Inch (ST8000DM004),Mechanical Hard Disk

SeagateAmazon2yrHDD

Capacity

8 TB

Price

$249.99

$/GB

$0.031

Check Price at Amazon
24

Seagate BarraCuda ST24000DM001 24TB 7200 RPM SATA 6.0Gb/s 3.5' Hard Drive Bare Drive

SeagateNeweggHDD

Capacity

24TB

Price

$749.99

$/GB

$0.031

Check Price at Newegg
25

WD 12TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Auto Backup Software - WDBBGB0120HBK-NESN

Western DigitalAmazonHDD

Capacity

12 TB

Price

$375.30

$/GB

$0.031

Check Price at Amazon
26

Toshiba-IMSourcing MG04ACA 6 TB 3.5' Internal Hard Drive - SATA - 7200rpm - 128 MB Buffer

ToshibaNeweggHDD

Capacity

6TB

Price

$188.00

$/GB

$0.031

Check Price at Newegg
27

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

$188.99

$/GB

$0.031

Check Price at Amazon
28

Seagate - Expansion 20TB External USB 3.0 Desktop Hard Drive with Rescue Data Recovery Services - Black

SeagateBest Buy1yrHDD
4.4(245)

Capacity

20 TB

Price

$629.99

$/GB

$0.032

Check Price at Best Buy
29

Seagate BarraCuda NE-ST8000DM004 8TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive Bare Drive

SeagateNeweggHDD

Capacity

8TB

Price

$257.00

$/GB

$0.032

Check Price at Newegg
30

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

SeagateAmazon90d low

Capacity

8 TB

Price

$258.00

$/GB

$0.032

Check Price at Amazon
31

HGST HDS724040ALE640 Deskstar 7K4000 HDS724040ALA640 4 TB Hard Drive - 3.5' Internal - SATA (SATA/600)

HGSTNeweggHDD

Capacity

4TB

Price

$129.10

$/GB

$0.032

Check Price at Newegg
32

Novus 16TB External USB-C 7200RPM Rugged Hard Drive

NovusNeweggHDD

Capacity

16TB

Price

$519.00

$/GB

$0.032

Check Price at Newegg
33

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
34

Western Digital 14TB Elements Desktop External Hard Drive, USB 3.0 external hard drive for plug-and-play storage - Western DigitalBWLG0140HBK-NESN

Western DigitalAmazonHDD

Capacity

14 TB

Price

$454.99

$/GB

$0.032

Check Price at Amazon
35

WD Elements 14TB USB 3.0 Desktop External Hard Drive WDBWLG0140HBK-NESN Black

Western DigitalNeweggHDD

Capacity

14TB

Price

$454.99

$/GB

$0.032

Check Price at Newegg
36

HGST - IMSOURCING 0F14688 4TB 7200RPM SATA 3.5IN

HGSTNeweggHDD

Capacity

4TB

Price

$130.71

$/GB

$0.033

Check Price at Newegg
37

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

SeagateAmazonHDD

Capacity

6 TB

Price

$196.90

$/GB

$0.033

Check Price at Amazon
38

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

$399.99

$/GB

$0.033

Check Price at Amazon
39

HGST HUS724030ALA640 - 3TB 3.5' SATA 7,200 RPM 6Gb/s Hard Drive

HGSTNeweggHDD

Capacity

3TB

Price

$100.00

$/GB

$0.033

Check Price at Newegg
40

HGST Ultrastar 7K3000 HUA723030ALA640 (0F12456) 3TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5' Enterprisel Hard Drive Bare Drive

HGSTNeweggHDD

Capacity

3TB

Price

$100.00

$/GB

$0.033

Check Price at Newegg
41

Seagate IronWolf ST12000VN0008 12 TB Hard Drive - 3.5' Internal - SATA (SATA/600) (ST12000VN0008) - OEM Pack, International Version No Warranty

SeagateNeweggHDD

Capacity

12TB

Price

$400.00

$/GB

$0.033

Check Price at Newegg
42

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
43

Toshiba Canvio Gaming - hard drive - 4 TB - USB 3.2 Gen 1

ToshibaNeweggHDD

Capacity

4TB

Price

$134.07

$/GB

$0.034

Check Price at Newegg
44

Toshiba X300 20TB PRO Performance Internal Hard Drive HDWR62AXZSTB

ToshibaNeweggHDD

Capacity

20TB

Price

$672.84

$/GB

$0.034

Check Price at Newegg
45

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

$269.99

$/GB

$0.034

Check Price at Amazon
46

Seagate IronWolf Pro ST16000NT001 16TB 7200 RPM 256MB Cache 3.5' Internal Hard Drive - OEM

SeagateNeweggHDD

Capacity

16TB

Price

$539.99

$/GB

$0.034

Check Price at Newegg
47

WD Blue 6TB Desktop Hard Disk Drive - 5400 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD60EZAX

Western DigitalNeweggHDD

Capacity

6TB

Price

$203.99

$/GB

$0.034

Check Price at Newegg
48

LaCie d2 Professional USB-C 20TB

LaCieNeweggHDD

Capacity

20TB

Price

$686.48

$/GB

$0.034

Check Price at Newegg
49

Seagate - Expansion 16TB External USB 3.0 Desktop Hard Drive with Rescue Data Recovery Services - Black

SeagateBest Buy1yrHDD
4.4(119)

Capacity

16 TB

Price

$549.99

$/GB

$0.034

Check Price at Best Buy
50

Fantom Drives Exos X16 ST16000NM001G 16TB 3.5' SATA Internal Hard Drive

FantomNeweggHDD

Capacity

16TB

Price

$550.00

$/GB

$0.034

Check Price at Newegg
51

Dell-IMSourcing 55FX5 2 TB Hard Drive - 3.5' Internal - SATA

Dell-IMSourcingNeweggHDD

Capacity

2TB

Price

$68.99

$/GB

$0.034

Check Price at Newegg
52

Seagate Expansion 10TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP10000400)

SeagateNeweggHDD

Capacity

10TB

Price

$346.39

$/GB

$0.035

Check Price at Newegg
53

WD 4TB My Passport Ultra Portable Storage External Hard Drive USB-C Gold WDBFTM0040BGD-CESN

Western DigitalNeweggHDD90d low

Capacity

4TB

Price

$138.99

$/GB

$0.035

Check Price at Newegg
54

SEAGATE BULK ST8000AS0003 8TB Exos 5E8 3.5 SATA 6Gb/s SP

SeagateNeweggHDD

Capacity

8TB

Price

$278.45

$/GB

$0.035

Check Price at Newegg
55

Novus 12TB External USB-C (3.1,Gen2) 7200RPM Hard Drive

NovusNeweggHDD

Capacity

12TB

Price

$419.00

$/GB

$0.035

Check Price at Newegg
56

WD 5TB My Passport Ultra for Mac Silver, Portable External Hard Drive, backup software with defense against ransomware, and password protection, USB-C and USB 3.1 - WDBPMV0050BSL-WESN

Western DigitalAmazonHDD90d low

Capacity

5 TB

Price

$174.99

$/GB

$0.035

Check Price at Amazon
57

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
58

WD Elements 12TB USB 3.0 Desktop External Hard Drive WDBWLG0120HBK-NESN Black

Western DigitalNeweggHDD90d low

Capacity

12TB

Price

$419.99

$/GB

$0.035

Check Price at Newegg
59

Seagate - Expansion Desktop 8TB HDD - Black

SeagateBest Buy1yrHDD
4.6(180)

Capacity

8 TB

Price

$279.99

$/GB

$0.035

Check Price at Best Buy
60

Seagate - Barracuda 8TB Internal Hard Drive for Desktops

SeagateBest Buy2yrHDD
4.6(422)
190 / 190MB/s

Capacity

8 TB

Price

$279.99

$/GB

$0.035

Check Price at Best Buy
61

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

$419.99

$/GB

$0.035

Check Price at Amazon
62

4TB Toshiba P300 3.5 Inch Serial ATA III 5400RPM 6GB Internal Hard Drive

ToshibaNeweggHDD

Capacity

4TB

Price

$140.50

$/GB

$0.035

Check Price at Newegg
63

Seagate Expansion 12TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP12000400)

SeagateAmazon1yrHDD

Capacity

12 TB

Price

$421.64

$/GB

$0.035

Check Price at Amazon
64

WD Ultrastar DC HC550 16TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38462 (WUH721816ALE6L4)

Western DigitalNeweggHDD

Capacity

16TB

Price

$563.28

$/GB

$0.035

Check Price at Newegg
65

Seagate Exos X16 ST14000NM001G 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Hard Drive, 512E

SeagateNeweggHDD

Capacity

14TB

Price

$499.00

$/GB

$0.036

Check Price at Newegg
66

WD Red Plus 12TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD120EFGX

Western DigitalNeweggHDD90d low

Capacity

12TB

Price

$429.99

$/GB

$0.036

Check Price at Newegg
67

Toshiba N300 Pro 12TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWG51CUZSVB

ToshibaNeweggHDD

Capacity

12TB

Price

$429.99

$/GB

$0.036

Check Price at Newegg
68

Seagate IronWolf Pro ST24000NT002 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive

SeagateNeweggHDD

Capacity

24TB

Price

$859.99

$/GB

$0.036

Check Price at Newegg
69

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
70

HDX Pro C 20TB USB-C Enterprise 7200RPM External Hard Drive

HDXNeweggHDD

Capacity

20TB

Price

$719.00

$/GB

$0.036

Check Price at Newegg
71

Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive

SeagateNeweggHDD

Capacity

20TB

Price

$719.99

$/GB

$0.036

Check Price at Newegg
72

HP 614827-001 3Tb 7200Rpm 3.5Inch 6G Sata Sc Lff Midline Hard Drive With Tray For Gen8 Servers Only

HPNeweggHDD

Capacity

3TB

Price

$108.19

$/GB

$0.036

Check Price at Newegg
73

Dell-IMSourcing 50XV4 1 TB Hard Drive - 3.5' Internal - SATA (SATA/300)

Dell-IMSourcingNeweggHDD

Capacity

1TB

Price

$36.19

$/GB

$0.036

Check Price at Newegg
74

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

$144.99

$/GB

$0.036

Check Price at Amazon
75

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

SeagateBest Buy2yrHDD

Capacity

8 TB

Price

$289.99

$/GB

$0.036

Check Price at Best Buy
76

Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 512MB Cache for DVR NVR Security Camera System with Drive Health Management and in-House Rescue Services (ST16000VE004)

SeagateAmazon3yrHDD

Capacity

16 TB

Price

$579.99

$/GB

$0.036

Check Price at Amazon
77

Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004)

SeagateNeweggHDD

Capacity

16TB

Price

$579.99

$/GB

$0.036

Check Price at Newegg
78

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

SeagateNeweggHDD

Capacity

8TB

Price

$289.99

$/GB

$0.036

Check Price at Newegg
79

Seagate IronWolf Pro ST32000NT000 32TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive

SeagateNeweggHDD

Capacity

32TB

Price

$1159.99

$/GB

$0.036

Check Price at Newegg
80

Seagate IronWolf Pro ST28000NT000 28TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive

SeagateNeweggHDD

Capacity

28TB

Price

$1019.99

$/GB

$0.036

Check Price at Newegg
81

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

$584.99

$/GB

$0.037

Check Price at Amazon
82

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

NEW GAMES ORDERAmazonHDD90d low

Capacity

3 TB

Price

$109.99

$/GB

$0.037

Check Price at Amazon
83

Novus 10TB External USB-C 7200RPM Rugged Hard Drive

NovusNeweggHDD

Capacity

10TB

Price

$369.00

$/GB

$0.037

Check Price at Newegg
84

HGST Ultrastar He8 HUH728060ALE600 (0F23269) 6TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5' Helium Platform Enterprise Hard Disk Drives

HGSTNeweggHDD

Capacity

6TB

Price

$222.00

$/GB

$0.037

Check Price at Newegg
85

Synology 20TB HAT3320 Plus Series SATA III 3.5' Internal NAS HDD ( HAT3320-20T)

SynologyNeweggHDD

Capacity

20TB

Price

$739.99

$/GB

$0.037

Check Price at Newegg
86

Seagate Exos X16 ST14000NM003G 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Hard Drives, 512E/4KN, SED Bare Drive

SeagateNeweggHDD

Capacity

14TB

Price

$520.10

$/GB

$0.037

Check Price at Newegg
87

Seagate IronWolf Pro 14 TB NAS RAID Internal Hard Drive - 7,200 RPM SATA 6 Gb/s 3.5-inch (ST14000NE0008)

SeagateNeweggHDD

Capacity

14TB

Price

$521.10

$/GB

$0.037

Check Price at Newegg
88

HDX Pro C 16TB USB-C Enterprise 7200RPM External Hard Drive

HDXNeweggHDD

Capacity

16TB

Price

$599.00

$/GB

$0.037

Check Price at Newegg
89

Seagate Exos X18 ST14000NM001J 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive, SED

SeagateNeweggHDD

Capacity

14TB

Price

$524.45

$/GB

$0.037

Check Price at Newegg
90

Seagate - Barracuda 4TB Internal Hard Drive for Desktops

SeagateBest Buy2yrHDD
4.7(303)
190 / 190MB/s

Capacity

4 TB

Price

$149.99

$/GB

$0.037

Check Price at Best Buy
91

Seagate BarraCuda ST4000DM004 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5' Hard Drives Bare Drive - OEM

SeagateNeweggHDD

Capacity

4TB

Price

$149.99

$/GB

$0.037

Check Price at Newegg
92

White Label WL 4TB 7200RPM 64MB Cache SATA 6.0Gb/s (Enterprise Grade) 3.5" Hard Drive (for Server, RAID, NAS, DVR, Desktop PC)

White LabelAmazon

Capacity

4 TB

Price

$149.99

$/GB

$0.037

Check Price at Amazon
93

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
94

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
95

Seagate - IronWolf 8TB NAS Internal Hard Drive with Rescue Data Recovery Services

SeagateBest Buy3yrHDD
4.8(196)
210 / 210MB/s

Capacity

8 TB

Price

$299.99

$/GB

$0.037

Check Price at Best Buy
96

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

$449.99

$/GB

$0.037

Check Price at Amazon
97

Dell - 2 TB 7200 RPM Enterprise SATA 3.5' Hard Drive for PowerEdge / PowerVault Systems. Equipped with tray. Mfr P/N: 2G4HM

DellNeweggHDD

Capacity

2TB

Price

$75.00

$/GB

$0.037

Check Price at Newegg
98

HP 6 TB 3.5' Internal Hard Drive

HPNeweggHDD90d low

Capacity

6TB

Price

$225.10

$/GB

$0.038

Check Price at Newegg
99

WD My Book 12TB USB 3.2 Gen 1 External Hard Drive Black

Western DigitalNeweggHDD

Capacity

12TB

Price

$450.99

$/GB

$0.038

Check Price at Newegg
100

Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D)

SeagateNeweggHDD

Capacity

18TB

Price

$677.00

$/GB

$0.038

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 973+ 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 $0.017/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 $0.0168/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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