As of April 2026, the cheapest 4TB hard drives (hdd) on BuyPerUnit costs $0.0270/GB — a Seagate Seagate 4 TB 3.5" Internal Hard Drive (4 TB) available at Amazon for $108.00. BuyPerUnit tracks 22 4TB hard drives (hdd) across Amazon, Best Buy, and Newegg, updated daily.

4TB Hard Drives (HDD)

22 4TB products ranked by price per gigabyte. Best value: $0.0270/GB

Products

22

Best $/GB

$0.0270

Highest $/GB

$0.2125

Show:
Click the bell to set a price alert
1

Seagate 4 TB 3.5" Internal Hard Drive

SeagateAmazonHDD

Capacity

4 TB

Price

$108.00

$/GB

$0.027

Check Price at Amazon
2

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
3

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
4

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 DigitalAmazonHDD

Capacity

4 TB

Price

$136.76

$/GB

$0.034

Check Price at Amazon
5

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
6

WD - Purple 4TB Surveillance Internal Hard Drive

Western DigitalBest Buy3yrHDD

Capacity

4 TB

Price

$139.99

$/GB

$0.035

Check Price at Best Buy
7

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
8

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
9

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
10

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
11

Seagate Barracuda ST4000LM024 4 TB 2.5" Internal Hard Drive

SeagateAmazonHDD

Capacity

4 TB

Price

$159.00

$/GB

$0.040

Check Price at Amazon
12

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
13

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
14

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
15

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
16

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
17

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
18

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
19

SanDisk Professional - G-DRIVE ArmorATD 4TB External USB-C Portable Hard Drive - Space Gray

G-DRIVEBest Buy3yrHDD
4.4(91)

Capacity

4 TB

Price

$229.99

$/GB

$0.057

Check Price at Best Buy
20

Axiom 400-ALRT-AX Enterprise - Hard Drive - 4 Tb - Hot-Swap - 3.5 Inch - Sas 12Gb/S - 7200 Rpm

AxiomNeweggHDD

Capacity

4TB

Price

$357.00

$/GB

$0.089

Check Price at Newegg
21

SANDISK 4TB Extreme Portable SSD (New Model) - up to 2000MB/s Transfer speeds - USB Type-C connectivity, Reliable Durability - Black - SDSSDE70-4T00-G25

SanDiskAmazonHDD

Capacity

4 TB

Price

$769.00

$/GB

$0.192

Check Price at Amazon
22

Samsung T7 Shield 4TB Portable SSD - 1050MB/s, Rugged, Water & Dust Resistant, for Content Creators - Black

SamsungAmazon3yrHDD

Capacity

4 TB

Price

$849.99

$/GB

$0.212

Check Price at Amazon
Compare 0 products
Compare

About 4TB Hard Drives (HDD)

Compare all 4TB hard drives (hdd) sorted by price per gigabyte. BuyPerUnit tracks 22 products in the 4TB capacity range to help you find the best storage deals. Prices range from $0.0270/GB to $0.2125/GB.

Other Capacities

Submit a Better Deal

Help others save money

Report an Issue

Help us keep data accurate