Hard Drives (HDD)

Ranked by price per gigabyte

Updated daily · No paid placements

As of April 2026, the cheapest hard drives (hdd) on BuyPerUnit costs $0.0212/GB — a Seagate Seagate - Barracuda 8TB Internal SATA Hard Drive for Desktops (8 TB) available at Best Buy for $169.99. BuyPerUnit tracks 266 hard drives (hdd) products across Amazon, Best Buy, and Newegg, updated daily. The average price is $0.0384/GB.
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1

Seagate - Barracuda 8TB Internal SATA Hard Drive for Desktops

SeagateBest BuyHDD
4.6(411)
45% below avg

Capacity

8 TB

Price

$169.99

$/GB

$0.021

Check Price at Best Buy
2

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

AvolusionAmazon2yrHDD42% below avg

Capacity

14 TB

Price

$309.99

$/GB

$0.022

Check Price at Amazon
3

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)
35% below avg

Capacity

8 TB

Price

$199.99

$/GB

$0.025

Check Price at Best Buy
4

WD 18TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Auto Backup Software - WDBBGB0180HBK-NESN

Western DigitalAmazonHDD33% below avg

Capacity

18 TB

Price

$463.99

$/GB

$0.026

Check Price at Amazon
5

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

Western DigitalAmazonHDD31% below avg

Capacity

16 TB

Price

$425.00

$/GB

$0.027

Check Price at Amazon
6

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

Western DigitalBest BuyHDD
4.7(42)
31% below avg

Capacity

12 TB

Price

$319.99

$/GB

$0.027

Check Price at Best Buy
7

Seagate 4 TB 3.5" Internal Hard Drive

SeagateAmazonHDD90d low

Capacity

4 TB

Price

$108.00

$/GB

$0.027

Check Price at Amazon
8

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

Western DigitalBest Buy2yrHDD
4.6(278)
27% below avg

Capacity

20 TB

Price

$559.99

$/GB

$0.028

Check Price at Best Buy
9

External Hard Drive Conversion Box For Series X/S Host M.2 Hard Drive Expansion Card Box For CHSN530 1TB Hard Disk-N33R

ExternalNeweggHDD27% below avg

Capacity

1TB

Price

$28.11

$/GB

$0.028

Check Price at Newegg
10

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)

SeagateAmazon5yrHDD27% below avg

Capacity

28 TB

Price

$789.99

$/GB

$0.028

Check Price at Amazon
11

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

SeagateBest Buy5yrHDD
4.5(8)
285 / 285MB/s
26% below avg

Capacity

24 TB

Price

$679.99

$/GB

$0.028

Check Price at Best Buy
12

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

Western DigitalBest Buy2yrHDD
4.5(752)
26% below avg

Capacity

18 TB

Price

$509.99

$/GB

$0.028

Check Price at Best Buy
13

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

Western DigitalAmazon2yrHDD25% below avg

Capacity

12 TB

Price

$344.15

$/GB

$0.029

Check Price at Amazon
14

Seagate 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)

SeagateAmazonHDD25% below avg

Capacity

16 TB

Price

$459.99

$/GB

$0.029

Check Price at Amazon
15

Seagate - Barracuda 8TB Internal Hard Drive for Desktops

SeagateBest Buy2yrHDD
4.6(411)
190 / 190MB/s
25% below avg

Capacity

8 TB

Price

$229.99

$/GB

$0.029

Check Price at Best Buy
16

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)

SeagateAmazonHDD25% below avg

Capacity

8 TB

Price

$229.99

$/GB

$0.029

Check Price at Amazon
17

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

Western DigitalAmazonHDD24% below avg

Capacity

14 TB

Price

$409.99

$/GB

$0.029

Check Price at Amazon
18

WD - Blue 8TB PC Internal Hard Drive for Desktops

Western DigitalBest Buy2yrHDD
4.2(18)
215 / 215MB/s
22% below avg

Capacity

8 TB

Price

$239.99

$/GB

$0.030

Check Price at Best Buy
19

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)

SeagateAmazonHDD22% below avg

Capacity

12 TB

Price

$359.99

$/GB

$0.030

Check Price at Amazon
20

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

Western DigitalAmazon2yrHDD22% below avg

Capacity

8 TB

Price

$239.99

$/GB

$0.030

Check Price at Amazon
21

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

Western DigitalAmazonHDD21% below avg

Capacity

8 TB

Price

$242.99

$/GB

$0.030

Check Price at Amazon
22

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

Western DigitalAmazonHDD20% below avg

Capacity

14 TB

Price

$429.99

$/GB

$0.031

Check Price at Amazon
23

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

SeagateBest Buy3yrHDD
4.8(191)
210 / 210MB/s

Capacity

8 TB

Price

$249.99

$/GB

$0.031

Check Price at Best Buy
24

Seagate - Expansion Desktop 8TB HDD - Black

SeagateBest Buy1yrHDD
4.7(170)

Capacity

8 TB

Price

$249.99

$/GB

$0.031

Check Price at Best Buy
25

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

SeagateAmazonHDD

Capacity

8 TB

Price

$249.99

$/GB

$0.031

Check Price at Amazon
26

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
27

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
28

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
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)

SeagateAmazon3yrHDD

Capacity

4 TB

Price

$129.99

$/GB

$0.032

Check Price at Amazon
30

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
31

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
32

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
33

Seagate Barracuda 6TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s 5400 RPM 256MB Cache for Computer Desktop PC (ST6000DM003)

SeagateAmazon2yrHDD

Capacity

6 TB

Price

$199.00

$/GB

$0.033

Check Price at Amazon
34

WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN

Western DigitalAmazonHDD90d low

Capacity

4 TB

Price

$136.76

$/GB

$0.034

Check Price at Amazon
35

Western Digital 10TB WD Blue Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD100EAGZ

Western DigitalAmazon2yrHDD

Capacity

10 TB

Price

$343.05

$/GB

$0.034

Check Price at Amazon
36

Seagate Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004)

SeagateAmazonHDD

Capacity

4 TB

Price

$139.00

$/GB

$0.035

Check Price at Amazon
37

WD - Purple 4TB Surveillance Internal Hard Drive

Western DigitalBest Buy3yrHDD
180 / 180MB/s

Capacity

4 TB

Price

$139.99

$/GB

$0.035

Check Price at Best Buy
38

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
39

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

Western DigitalBest Buy2yrHDD
4.7(7,212)

Capacity

8 TB

Price

$279.99

$/GB

$0.035

Check Price at Best Buy
40

Western Digital 8TB Elements Desktop External Hard Drive, USB 3.0 external hard drive for plug-and-play storage - Western DigitalBWLG0080HBK-NESN, Black

Western DigitalAmazonHDD

Capacity

8 TB

Price

$279.99

$/GB

$0.035

Check Price at Amazon
41

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

$279.99

$/GB

$0.035

Check Price at Amazon
42

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

$211.54

$/GB

$0.035

Check Price at Amazon
43

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
44

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

Western DigitalBest Buy2yrHDD
4.6(104)

Capacity

6 TB

Price

$214.99

$/GB

$0.036

Check Price at Best Buy
45

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(511)

Capacity

5 TB

Price

$179.99

$/GB

$0.036

Check Price at Best Buy
46

Toshiba Canvio Basics 4TB Portable External Hard Drive USB 3.0, Black - HDTB540XK3CA

TOSHIBAAmazon1yrHDD

Capacity

4 TB

Price

$145.00

$/GB

$0.036

Check Price at Amazon
47

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

SeagateAmazonHDD

Capacity

6 TB

Price

$219.99

$/GB

$0.037

Check Price at Amazon
48

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

$219.99

$/GB

$0.037

Check Price at Amazon
49

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

Western DigitalBest Buy2yrHDD
4.7(11,984)

Capacity

5 TB

Price

$184.99

$/GB

$0.037

Check Price at Best Buy
50

Western Digital WD 5TB Elements Portable External Hard Drive for Windows, USB 3.2 Gen 1/USB 3.0 for PC & Mac, Plug and Play Ready - WDBU6Y0050BBK-WESN

Western DigitalAmazon2yrHDD

Capacity

5 TB

Price

$184.99

$/GB

$0.037

Check Price at Amazon
51

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
52

WD 4TB Elements Portable External Hard Drive for Windows, USB 3.2 Gen 1/USB 3.0 for PC & Mac, Plug and Play Ready - ‎WDBU6Y0040BBK-WESN

Western DigitalAmazon2yrHDD

Capacity

4 TB

Price

$149.99

$/GB

$0.037

Check Price at Amazon
53

WD - My Passport 6TB External USB 3.0 Portable Hard Drive - Black

Western DigitalBest Buy3yrHDD
4.7(1,802)

Capacity

6 TB

Price

$224.99

$/GB

$0.037

Check Price at Best Buy
54

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

Western DigitalBest Buy3yrHDD
4.7(973)
250 / 250MB/s

Capacity

8 TB

Price

$299.99

$/GB

$0.037

Check Price at Best Buy
55

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

SeagateBest Buy1yrHDD
4.8(272)

Capacity

5 TB

Price

$189.99

$/GB

$0.038

Check Price at Best Buy
56

WD - BLACK 6TB Gaming Internal Hard Drive

Western DigitalBest Buy5yrHDD
4.6(50)
256 / 256MB/s

Capacity

6 TB

Price

$229.99

$/GB

$0.038

Check Price at Best Buy
57

Western Digital 6TB WD_Black Performance Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD6004FZBX

Western DigitalAmazon5yrHDD

Capacity

6 TB

Price

$229.99

$/GB

$0.038

Check Price at Amazon
58

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

Western DigitalBest Buy3yrHDD
4.7(2,876)

Capacity

5 TB

Price

$194.99

$/GB

$0.039

Check Price at Best Buy
59

Western Digital 6TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Auto Backup Software - WDBBGB0060HBK-NESN

Western DigitalAmazonHDD

Capacity

6 TB

Price

$236.99

$/GB

$0.039

Check Price at Amazon
60

Seagate Barracuda ST4000LM024 4 TB 2.5" Internal Hard Drive

SeagateAmazonHDD90d low

Capacity

4 TB

Price

$159.00

$/GB

$0.040

Check Price at Amazon
61

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

MDD MAXDIGITALDATAAmazon3yrHDD

Capacity

500 GB

Price

$19.99

$/GB

$0.040

Check Price at Amazon
62

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 labelAmazonHDD

Capacity

3 TB

Price

$119.99

$/GB

$0.040

Check Price at Amazon
63

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

Western DigitalBest Buy3yrHDD
4.8(470)
140 / 140MB/s

Capacity

5 TB

Price

$199.99

$/GB

$0.040

Check Price at Best Buy
64

WD - My Cloud Home 4TB Personal Cloud - White

Western DigitalBest Buy2yrHDD
4.0(1,469)

Capacity

4 TB

Price

$159.99

$/GB

$0.040

Check Price at Best Buy
65

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

$159.99

$/GB

$0.040

Check Price at Amazon
66

WD 5TB My Passport Ultra, Blue, Portable External Hard Drive, backup software with defense against ransomware, and password protection, USB-C and USB 3.1 - WDBFTM0050BBL-WESN

Western DigitalAmazonHDD

Capacity

5 TB

Price

$204.99

$/GB

$0.041

Check Price at Amazon
67

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

$207.00

$/GB

$0.041

Check Price at Amazon
68

LaCie 5TB Rugged USB-C Portable Hard Drive

LaCieAmazonHDD

Capacity

5 TB

Price

$209.00

$/GB

$0.042

Check Price at Amazon
69

LaCie - Rugged 5TB External USB-C, USB 3.1 Gen 1 Portable Hard Drive - Orange/Silver

LaCieBest Buy2yrHDD
4.7(870)

Capacity

5 TB

Price

$209.99

$/GB

$0.042

Check Price at Best Buy
70

Seagate Rugged STFR5000800 5 TB External Hard Drive, Portable

LaCieAmazon2yrHDD

Capacity

5 TB

Price

$209.99

$/GB

$0.042

Check Price at Amazon
71

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

$419.99

$/GB

$0.042

Check Price at Amazon
72

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

Western DigitalAmazon3yrHDD

Capacity

6 TB

Price

$253.27

$/GB

$0.042

Check Price at Amazon
73

Western Digital 8TB WD Purple Pro Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD8002PURP

Western DigitalAmazon5yrHDD12% this week

Capacity

8 TB

Price

$340.57

$/GB

$0.043

Check Price at Amazon
74

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

SeagateNeweggHDD

Capacity

10TB

Price

$434.45

$/GB

$0.043

Check Price at Newegg
75

WD - My Passport for Mac 4TB External USB 3.0 Portable Hard Drive - Blue

Western DigitalBest Buy3yrHDD
4.6(607)

Capacity

4 TB

Price

$174.99

$/GB

$0.044

Check Price at Best Buy
76

Buffalo 8 TB Hard Drive - Internal - TAA Compliant

BuffaloNeweggHDD

Capacity

8TB

Price

$358.22

$/GB

$0.045

Check Price at Newegg
77

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

SeagateAmazonHDD

Capacity

2 TB

Price

$89.99

$/GB

$0.045

Check Price at Amazon
78

WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver

Western DigitalBest Buy3yrHDD
4.7(1,169)

Capacity

4 TB

Price

$179.99

$/GB

$0.045

Check Price at Best Buy
79

WD - My Passport Ultra for Mac 4TB External USB 3.0 Portable Hard Drive - Silver

Western DigitalBest Buy3yrHDD
4.5(549)

Capacity

4 TB

Price

$179.99

$/GB

$0.045

Check Price at Best Buy
80

Western Digital 4TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Backup Software - WDBBGB0040HBK-NESN

Western DigitalAmazonHDD

Capacity

4 TB

Price

$180.90

$/GB

$0.045

Check Price at Amazon
81

Seagate One Touch, 2TB, Password activated hardware encryption, portable external hard drive, portable external hard drive, PC, Notebook & Mac, USB 3.0, Black (STKY2000400)

SeagateAmazon2yrHDD

Capacity

2 TB

Price

$92.38

$/GB

$0.046

Check Price at Amazon
82

Western Digital WD Bulk WD10EURX 1TB AV GP SATA 6Gbs 3.5", 1 TB

Western DigitalAmazonHDD

Capacity

1 TB

Price

$47.99

$/GB

$0.048

Check Price at Amazon
83

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

Western DigitalAmazonHDD

Capacity

8 TB

Price

$389.99

$/GB

$0.049

Check Price at Amazon
84

NRICO Ultra Slim 750GB Portable External Hard Drive USB3.0 HDD Storage Compatible for PC, Desktop, Laptop,Mac,PS4, Xbox one (Black, 750, GB)

NRICOAmazon3yrHDD

Capacity

750 GB

Price

$37.00

$/GB

$0.049

Check Price at Amazon
85

Toshiba Canvio Basics 2TB Portable External Hard Drive USB 3.0, Black - HDTB520XK3AA

TOSHIBAAmazon1yrHDD

Capacity

2 TB

Price

$99.00

$/GB

$0.050

Check Price at Amazon
86

Seagate - Game Drive for Xbox 2TB External USB 3.2 Gen 1 Portable Hard Drive Xbox Certified with Green LED Bar - Black

SeagateBest BuyHDD
4.6(978)

Capacity

2 TB

Price

$99.99

$/GB

$0.050

Check Price at Best Buy
87

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 DigitalAmazonHDD

Capacity

3 TB

Price

$150.00

$/GB

$0.050

Check Price at Amazon
88

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

TOSHIBAAmazonHDD

Capacity

500 GB

Price

$25.38

$/GB

$0.051

Check Price at Amazon
89

SanDisk Professional 5TB G-Drive ArmorATD - Rugged, Durable Portable External Hard Drive HDD, USB-C, USB 3.2 Gen 1 - SDPH81G-005T-GBA1D

Western DigitalAmazon3yrHDD

Capacity

5 TB

Price

$254.99

$/GB

$0.051

Check Price at Amazon
90

Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD44PURZ

Western DigitalAmazonHDD

Capacity

4 TB

Price

$205.99

$/GB

$0.051

Check Price at Amazon
91

IFLASH 1TB Portable External Hard Drive

IFLASHAmazonHDD

Capacity

1 TB

Price

$51.99

$/GB

$0.052

Check Price at Amazon
92

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

SeagateAmazon2yrHDD90d low

Capacity

1 TB

Price

$52.00

$/GB

$0.052

Check Price at Amazon
93

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

Western DigitalAmazonHDD

Capacity

3 TB

Price

$160.00

$/GB

$0.053

Check Price at Amazon
94

MDD 2TB PS4 Hard Drive Upgrade Kit Bundle with Toshiba 2TB 5400RPM 16MB Cache SATA 6Gb/s 2.5in Internal Hard Drive (Works for PS4 Game Console)

MDD MAXDIGITALDATAAmazon2yrHDD

Capacity

2 TB

Price

$108.99

$/GB

$0.054

Check Price at Amazon
95

Tianken Ultra Slim Portable External Hard Drive USB 3.0 HDD Storage for PC, Laptop, Mac, Xbox one, PS4, PS5 (750GB)

TiankenAmazon1yrHDD

Capacity

750 GB

Price

$40.99

$/GB

$0.055

Check Price at Amazon
96

Seagate - One Touch with Password 2TB External USB 3.0 Portable Hard Drive with Rescue Data Recovery Services - Black

SeagateBest Buy2yrHDD
4.8(107)

Capacity

2 TB

Price

$109.99

$/GB

$0.055

Check Price at Best Buy
97

WD - Easystore 2TB External USB 3.2 Gen 1 Portable Hard Drive - Black

Western DigitalBest Buy2yrHDD
4.7(17,565)

Capacity

2 TB

Price

$109.99

$/GB

$0.055

Check Price at Best Buy
98

Maxone 500GB Ultra Slim Portable External Hard Drive HDD Compatible with PC, Laptop, Grey

MaxoneAmazon3yrHDD

Capacity

500 GB

Price

$27.99

$/GB

$0.056

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99

NRICO Portable External Hard Drive, USB 3.0, 2.5 Inch, Compatible with PC, Mac, Desktop (Blue, 500, GB)

NRICOAmazon2yrHDD90d low

Capacity

500 GB

Price

$28.49

$/GB

$0.057

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100

YOTUO Portable External Hard Drive Storage Expansion Mobile HDD USB 3.0 for PC, Mac, Desktop, Laptop, PS4, PS5, Xbox One X/S, Xbox 360, Xbox Series X/S, Office & Game (Black, 750GB)

YOTUOAmazonHDD

Capacity

750 GB

Price

$42.74

$/GB

$0.057

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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 266+ 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 $0.021/GB, while the average across all drives is $0.038/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 $0.0212/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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