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 $0.0250/GB — a Seagate Seagate - Game Drive for Xbox 8TB External USB 3.2 Gen 1 Desktop Hard Drive with Certified Xbox Green LED Lighting - Black (8 TB) available at Best Buy for $199.99. BuyPerUnit tracks 329 hard drives (hdd) products across Amazon, Best Buy, and Newegg, updated daily. The average price is $0.0374/GB.
Ranked by:$/GB
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1

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)
33% below avg

Capacity

8 TB

Price

$199.99

$/GB

$0.025

Check Price at Best Buy
2

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)

UnknownAmazon30% below avg

Capacity

8 TB

Price

$209.00

$/GB

$0.026

Check Price at Amazon
3

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)

SeagateAmazon28% below avg

Capacity

8 TB

Price

$215.00

$/GB

$0.027

Check Price at Amazon
4

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

SeagateAmazon27% below avg

Capacity

8 TB

Price

$219.50

$/GB

$0.027

Check Price at Amazon
5

Seagate - Barracuda 8TB Internal Hard Drive for Desktops

SeagateBest Buy2yrHDD
4.6(413)
190 / 190MB/s
23% below avg

Capacity

8 TB

Price

$229.99

$/GB

$0.029

Check Price at Best Buy
6

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)

SeagateAmazonHDD23% below avg

Capacity

8 TB

Price

$229.99

$/GB

$0.029

Check Price at Amazon
7

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

UnknownAmazon23% below avg

Capacity

8 TB

Price

$229.99

$/GB

$0.029

Check Price at Amazon
8

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

UnknownAmazon23% below avg

Capacity

8 TB

Price

$229.99

$/GB

$0.029

Check Price at Amazon
9

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

SeagateAmazon23% below avg

Capacity

8 TB

Price

$230.00

$/GB

$0.029

Check Price at Amazon
10

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
11

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
12

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
13

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
14

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
15

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
16

WD - Blue 8TB PC Internal Hard Drive for Desktops

Western DigitalBest Buy2yrHDD
4.2(18)
215 / 215MB/s

Capacity

8 TB

Price

$239.99

$/GB

$0.030

Check Price at Best Buy
17

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
18

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
19

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

$242.99

$/GB

$0.030

Check Price at Amazon
20

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
21

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
22

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

SeagateAmazon2yrHDD

Capacity

8 TB

Price

$249.99

$/GB

$0.031

Check Price at Amazon
23

Seagate - Expansion Desktop 8TB HDD - Black

SeagateBest Buy1yrHDD
4.6(174)

Capacity

8 TB

Price

$249.99

$/GB

$0.031

Check Price at Best Buy
24

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

$249.99

$/GB

$0.031

Check Price at Amazon
25

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
26

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
27

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
28

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
29

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
30

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
31

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
32

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
33

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
34

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
35

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
36

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
37

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
38

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
39

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
40

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

SeagateBest Buy2yrHDD
4.8(31)

Capacity

5 TB

Price

$169.99

$/GB

$0.034

Check Price at Best Buy
41

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

Western DigitalBest Buy2yrHDD
4.7(7,217)

Capacity

8 TB

Price

$279.99

$/GB

$0.035

Check Price at Best Buy
42

WD - BLACK 8TB Gaming Internal Hard Drive

Western DigitalBest Buy5yrHDD
4.3(7)
267 / 267MB/s

Capacity

8 TB

Price

$279.99

$/GB

$0.035

Check Price at Best Buy
43

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

SeagateAmazonHDD

Capacity

6 TB

Price

$212.00

$/GB

$0.035

Check Price at Amazon
44

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

Western DigitalBest Buy2yrHDD
4.6(108)

Capacity

6 TB

Price

$214.99

$/GB

$0.036

Check Price at Best Buy
45

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
46

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

Western DigitalBest Buy3yrHDD
4.8(471)
140 / 140MB/s

Capacity

5 TB

Price

$179.99

$/GB

$0.036

Check Price at Best Buy
47

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(513)

Capacity

5 TB

Price

$179.99

$/GB

$0.036

Check Price at Best Buy
48

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
49

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

ADATAAmazon3yrHDD

Capacity

5 TB

Price

$179.99

$/GB

$0.036

Check Price at Amazon
50

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
51

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

Western DigitalBest Buy3yrHDD
4.7(1,803)

Capacity

6 TB

Price

$224.99

$/GB

$0.037

Check Price at Best Buy
52

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

Western DigitalBest Buy3yrHDD
4.7(975)
250 / 250MB/s

Capacity

8 TB

Price

$299.99

$/GB

$0.037

Check Price at Best Buy
53

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

SeagateBest Buy1yrHDD
4.8(280)

Capacity

5 TB

Price

$189.99

$/GB

$0.038

Check Price at Best Buy
54

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

$189.99

$/GB

$0.038

Check Price at Amazon
55

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

$189.99

$/GB

$0.038

Check Price at Amazon
56

LaCie Rugged 5TB Portable External HDD - USB 3.0/2.0 Compatible, Shock/Dust/Rain Resistant for Mac & PC, Orange, Grey

LaCieAmazon2yrHDD

Capacity

5 TB

Price

$189.99

$/GB

$0.038

Check Price at Amazon
57

WD - BLACK 6TB Gaming Internal Hard Drive

Western DigitalBest Buy5yrHDD
4.6(52)
256 / 256MB/s

Capacity

6 TB

Price

$229.99

$/GB

$0.038

Check Price at Best Buy
58

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

Western DigitalBest Buy3yrHDD
4.7(2,884)

Capacity

5 TB

Price

$194.99

$/GB

$0.039

Check Price at Best Buy
59

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

Check Price at Amazon
60

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
61

Seagate Rugged STFR5000800 5 TB External Hard Drive, Portable

LaCieAmazon2yrHDD90d low

Capacity

5 TB

Price

$199.99

$/GB

$0.040

Check Price at Amazon
62

WD 5TB My Passport for Mac, Navy, Portable External Hard Drive with backup software and password protection, USB 3.1/USB 3.0 compatible - WDBA2F0050BBL-WESN

Western DigitalAmazon

Capacity

5 TB

Price

$199.99

$/GB

$0.040

Check Price at Amazon
63

LaCie Rugged USB-C, 5TB, Portable External Hard Drive, Drop, Shock, Dust, Rain Resistant, for Mac & PC (STFR5000800)

LaCieAmazonHDD

Capacity

5 TB

Price

$208.22

$/GB

$0.042

Check Price at Amazon
64

LaCie 5TB Rugged USB-C Portable Hard Drive

LaCieAmazonHDD

Capacity

5 TB

Price

$209.00

$/GB

$0.042

Check Price at Amazon
65

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

LaCieBest Buy2yrHDD
4.7(875)

Capacity

5 TB

Price

$209.99

$/GB

$0.042

Check Price at Best Buy
66

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
67

Western Digital WD Red Plus Internal Hard Drive 8TB CMR 3.5 inch SATA 5640 RPM 256MB NAS WD80EFPX-AJP Eco Package

Western DigitalAmazon

Capacity

8 TB

Price

$267.72

$/GB

$0.045

Check Price at Amazon
68

Buffalo 8 TB Hard Drive - Internal - TAA Compliant

BuffaloNeweggHDD

Capacity

8TB

Price

$358.22

$/GB

$0.045

Check Price at Newegg
69

Western Digital WD Red Plus Internal Hard Drive 8TB CMR 3.5 inch SATA 5640 RPM 256MB NAS WD80EFPX-AJP Eco Package

Western DigitalAmazon

Capacity

8 TB

Price

$366.36

$/GB

$0.046

Check Price at Amazon
70

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 DigitalAmazonHDD

Capacity

8 TB

Price

$380.00

$/GB

$0.048

Check Price at Amazon
71

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

$399.99

$/GB

$0.050

Check Price at Amazon
72

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

SanDiskAmazonHDD

Capacity

5 TB

Price

$294.99

$/GB

$0.059

Check Price at Amazon
73

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 DigitalAmazon5yrHDD

Capacity

8 TB

Price

$499.99

$/GB

$0.062

Check Price at Amazon
74

Western Digital 6TB WD Red NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD60EFAX

Western DigitalAmazon

Capacity

6 TB

Price

$379.90

$/GB

$0.063

Check Price at Amazon
75

Seagate 6TB IronWolf NAS SATA 6Gb/s NCQ 128MB Cache 3.5-Inch Internal Hard Drive (ST6000VN0041)

SeagateAmazon

Capacity

6 TB

Price

$379.99

$/GB

$0.063

Check Price at Amazon
76

Western Digital 6TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" - WD6003FFBX

Western DigitalAmazon

Capacity

6 TB

Price

$454.45

$/GB

$0.076

Check Price at Amazon
77

Crucial X10 8TB Portable SSD, Up to 2,100MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac & Android, Durable Storage for Games, Photos & Files, Blue - CT8000X10SSD9-02

CrucialAmazonHDD

Capacity

8 TB

Price

$845.99

$/GB

$0.106

Check Price at Amazon
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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 329+ 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 $0.025/GB, while the average across all drives is $0.037/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 $0.0250/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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