Storage Comparison

Find your next drive. Know what you’re buying.

Compare current US Amazon offers by price, capacity and condition. Browse manufacturer specifications separately in the catalog.

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Live Listings

Product	Form Factor	Technology	Capacity	Condition	$/TB	Price	Warranty
Seagate Constellation Es.3 St4000nm0023 4 Tb 3.5 Internal Hard Drive	Internal 3.5"	HDD	4 TB 4000 GB	Used	$20.25 /TB	$81.00 as of Sep 12, 2026 10:58 UTC	—	View
Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 64 MB Cache, 3.5" - WD40EZRZ	3.5"	HDD	4 TB 4000 GB	Used	$27.24 /TB	$108.96 as of Sep 12, 2026 04:47 UTC	—	View
HGST Ultrastar 7K4000 HUS724040ALE640 4TB 64MB Cache 7200RPM SATA 6.0Gb/s 3.5 inches Internal Enterprise Hard Drive (Renewed)	Internal 3.5"	HDD	4 TB 4000 GB	Used	$30.00 /TB	$120.00 as of Sep 12, 2026 10:53 UTC	—	View
Seagate 4TB 7200RPM HDD	Internal 3.5"	HDD	4 TB 4000 GB	Used	$30.75 /TB	$123.00 as of Sep 12, 2026 10:56 UTC	5 yrs	View
Western Digital WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4	3.5"	HDD	4 TB 4000 GB	Used	$31.00 /TB	$124.00 as of Sep 12, 2026 11:48 UTC	—	View
Seagate 4TB Enterprise Capacity HDD 7200RPM SATA 6Gbps 128 MB Cache Internal Bare Drive (ST4000NM0033)	—	HDD	4 TB 4000 GB	Used	$31.25 /TB	$125.00 as of Sep 12, 2026 11:46 UTC	1 yr	View
Seagate Exos 7E10 ST4000NM000B - Hard Drive - 4 TB - SATA 6Gb/s	—	HDD	4 TB 4000 GB	Used	$31.25 /TB	$125.01 as of Sep 12, 2026 11:46 UTC	—	View
Western Digital HUS726T4TALA6L4 4TB Ultrastar DC HC310 SATA HDD - 7200 RPM Class, SATA 6 Gb/s, 256MB Cache, 3.5"	3.5"	HDD	4 TB 4000 GB	Used	$32.00 /TB	$128.00 as of Sep 12, 2026 11:47 UTC	—	View
WD Black 4TB Performance Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch - WD4003FZEX	3.5"	HDD	4 TB 4000 GB	Used	$32.24 /TB	$128.98 as of Sep 11, 2026 21:02 UTC	5 yrs	View
WD40EZRX Western Digital 4TB Internal Hard Drive IntelliPower 64MB Cache SATA 6.0Gb (Renewed)	Internal 3.5"	HDD	4 TB 4000 GB	Used	$32.47 /TB	$129.89 as of Sep 12, 2026 10:58 UTC	3 mo	View
Toshiba 4TB 3.5" SATA 6Gb/s 7200 RPM 128M Enterprise Hard Drive - MG04ACA400N	3.5"	HDD	4 TB 4000 GB	Used	$32.50 /TB	$130.00 as of Sep 12, 2026 04:48 UTC	—	View
Seagate Constellation ES.3 ST4000NM0033 4 TB Hard Drive - 3.5 Internal - SATA	—	HDD	4 TB 4000 GB	Used	$33.75 /TB	$135.00 as of Sep 12, 2026 04:47 UTC	—	View
Dell Enterprise 4Tb 7.2K 6Gbps Sata 3.5'' Hard Drive	Internal 3.5"	HDD	4 TB 4000 GB	Used	$34.25 /TB	$137.00 as of Sep 12, 2026 10:56 UTC	—	View
Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX	3.5"	HDD	4 TB 4000 GB	Used	$35.00 /TB	$139.99 as of Sep 12, 2026 11:48 UTC	—	View
4N6CY DELL 4TB 7.2K 6G LFF SATA Hard Drive	Internal 3.5"	HDD	4 TB 4000 GB	Used	$35.00 /TB	$140.00 as of Sep 12, 2026 10:56 UTC	—	View
Toshiba MG04ACA400E 4TB 128MB Cache 7200RPM SATA 6.0Gb/s 3.5inch Enterprise Hard Drive (Renewed)	3.5"	HDD	4 TB 4000 GB	Used	$35.00 /TB	$139.99 as of Sep 12, 2026 04:48 UTC	—	View
Toshiba MG04ACA400N - Toshiba 4TB 3.5" SATA 7.2K 6Gb/s Hard Drive	3.5"	HDD	4 TB 4000 GB	New	$36.25 /TB	$145.00 as of Sep 12, 2026 04:48 UTC	—	View
4TB 7200RPM SATA 3.5" Hard Drive Compatible MG04ACA400N	Internal 3.5"	HDD	4 TB 4000 GB	New	$36.25 /TB	$145.00 as of Sep 12, 2026 10:58 UTC	—	View
SEAGATE ST4000VX007 Skyhawk 4TB Surveillance Hard SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive-Frustration Free Packaging (ST4000VXZ07) Mechanical Hard Disk ST4000VX007 specifications →	Internal 3.5"	HDD	4 TB 4000 GB	Used	$37.00 /TB	$148.00 as of Sep 12, 2026 10:56 UTC	3 yrs	View
(Old Model) Seagate 4TB Surveillance HDD 6Gb/s Internal Hard Drive (ST4000VX000) ST4000VX000 specifications →	3.5-inch	HDD	4 TB 4000 GB	Used	$37.25 /TB	$149.00 as of Sep 12, 2026 04:47 UTC	—	View
WL 4TB 64MB Cache 5400RPM SATA III (6.0Gb/s) 3.5" Internal Surveillance DVR Hard Drive - w/ 1 Year Warranty	Internal 3.5"	HDD	4 TB 4000 GB	New	$37.50 /TB	$149.99 as of Sep 12, 2026 10:58 UTC	1 yr	View
HGST Ultrastar 7K6000 HUS726040ALE610 (0F23005) 4 TB 7200 RPM SATA 6Gb/s 3.5-Inch Internal Hard Drive (Renewed)	Internal 3.5"	HDD	4 TB 4000 GB	Used	$37.50 /TB	$149.99 as of Sep 12, 2026 10:58 UTC	3 mo	View
Seagate Constellation ES ST4000NM0033 4TB 7200RPM 128MB Cache SATA 6.0Gb/s 3.5inch Internal Enterprise Hard Drive OEM (Renewed)	3.5"	HDD	4 TB 4000 GB	Used	$37.50 /TB	$149.99 as of Sep 12, 2026 04:47 UTC	—	View
Seagate Constellation Es.3 St4000nm0023 4 Tb 3.5 Internal Hard Drive	Internal 3.5"	HDD	4 TB 4000 GB	New	$39.21 /TB	$156.85 as of Sep 12, 2026 10:58 UTC	—	View
DELL/Seagate Constellation ES ST4000NM0033 4TB 7200RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Enterprise Hard Drive - 5 Year Warranty (Renewed)	Internal 3.5"	HDD	4 TB 4000 GB	Used	$39.90 /TB	$159.60 as of Sep 12, 2026 10:58 UTC	3 mo	View
Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD40EZAZ (WD Factory Recertified) (Renewed)	3.5"	HDD	4 TB 4000 GB	Used	$39.94 /TB	$159.75 as of Sep 12, 2026 04:48 UTC	—	View
Western Digital RE WD4000FYYZ 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5in Enterprise Internal Hard Drive - OEM (Renewed)	—	HDD	4 TB 4000 GB	Used	$39.99 /TB	$159.95 as of Sep 12, 2026 11:47 UTC	—	View
Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 64 MB Cache, 3.5" - WD40PURZ	3.5"	HDD	4 TB 4000 GB	Used	$40.00 /TB	$159.99 as of Sep 12, 2026 11:45 UTC	—	View
MDD 4TB 64MB Cache 5900PM SATA 6.0Gb/s 3.5-inch Internal Surveillance CCTV DVR Hard Drive (MD4000GSA6459DVR) - 2 Year Warranty (Renewed)	Internal 3.5"	HDD	4 TB 4000 GB	Used	$40.00 /TB	$159.99 as of Sep 12, 2026 10:58 UTC	2 yrs	View
Seagate Bulk ST4000NM0033 Constellation ES.3 4TB SATA 6G (Renewed)	Internal 3.5"	HDD	4 TB 4000 GB	Used	$40.00 /TB	$159.99 as of Sep 12, 2026 10:58 UTC	3 mo	View
Seagate Enterprise Capacity 3.5 \| ST4000NM0035 \| 4TB 7.2K RPM 128MB Cache 3.5in SATA 6Gb/s \| 512n \| FIPS 140-2 \| Enterprise Internal Hard Disk Drive (Renewed)	—	HDD	4 TB 4000 GB	Used	$40.00 /TB	$159.99 as of Sep 12, 2026 11:46 UTC	3 mo	View
Seagate Exos 7E8 4TB 512n SATA 128MB Cache 3.5-Inch Enterprise Hard Drive (ST4000NM0035) (Renewed)	3.5"	HDD	4 TB 4000 GB	Used	$40.00 /TB	$159.99 as of Sep 12, 2026 11:46 UTC	2 yrs	View
HGST Ultrastar 7K6000 4TB 7200 RPM SATA 128MB Cache 3.5" Internal Enterprise Hard Drive - HUS726040ALE610 (0F23005) (Renewed)	Internal 3.5"	HDD	4 TB 4000 GB	Used	$40.00 /TB	$159.99 as of Sep 12, 2026 10:58 UTC	3 mo	View
Seagate Exos 7E8 ST4000NM0115 4TB 7.2K RPM SATA 6Gb/s 512e 128MB 3.5inch Hard Drive (Renewed)	3.5"	HDD	4 TB 4000 GB	Used	$40.00 /TB	$159.99 as of Sep 12, 2026 11:44 UTC	3 mo	View
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)	3.5"	HDD	4 TB 4000 GB	New	$40.00 /TB	$159.99 as of Sep 12, 2026 11:44 UTC	3 yrs	View
Seagate Exos 7E8 4TB Enterprise HDD – ST4000NM002A 7200 RPM SATA 6Gb/s 128MB Cache 3.5-Inch Hard Drive (Renewed)	3.5"	HDD	4 TB 4000 GB	Used	$40.00 /TB	$159.99 as of Sep 12, 2026 11:44 UTC	3 mo	View
Western Digital Ultrastar DC HC320 HUS726T4TALE6L4 4TB 7200RPM 64MB Cache SATA 6.0Gb/s 3.5 Inch Internal Datacenter Hard Drive (Renewed)	3.5"	HDD	4 TB 4000 GB	Used	$40.00 /TB	$159.99 as of Sep 12, 2026 04:48 UTC	3 mo	View
Seagate 4TB HDD 5.9K RPM 3.5" 6Gb/s SATA Hard Disk Drive Model: ST4000DM000 DP/N: VF3T3 ST4000DM000 specifications →	3.5-inch	HDD	4 TB 4000 GB	Used	$40.25 /TB	$161.00 as of Sep 12, 2026 11:46 UTC	—	View
Toshiba Hard Drive - 4 TB - Internal - 3.5" - SATA 6Gb/s - NL - 7200 RPM - Buffer: 128 MB	Internal 3.5"	HDD	4 TB 4000 GB	New	$42.50 /TB	$169.99 as of Sep 12, 2026 10:58 UTC	—	View
White Label WL 4TB 7200RPM 64MB Cache SATA 6.0Gb/s (Enterprise Grade) 3.5" Hard Drive (for Server, RAID, NAS, DVR, Desktop PC)	Internal 3.5"	HDD	4 TB 4000 GB	New	$42.50 /TB	$169.99 as of Sep 12, 2026 10:58 UTC	—	View
Western Digital 4TB WD Black Performance Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD4005FZBX WD4005FZBX specifications →	Internal 3.5"	HDD	4 TB 4000 GB	Used	$42.50 /TB	$169.99 as of Sep 12, 2026 10:56 UTC	—	View
Hitachi 2022 HGST WD Ultrastar HUS726T4TALE6L4 4TB 7200 RPM 512e SATA 6Gb/s 3.5-inch Internal Hard Disk Drive (Renewed)	Internal 3.5"	HDD	4 TB 4000 GB	Used	$42.50 /TB	$169.99 as of Sep 12, 2026 10:58 UTC	3 mo	View
MDD MAXDIGITALDATA MDD (MDD4TSATA6472DVR) 4TB 7200RPM 64MB Cache SATA 6.0Gb/s 3.5-inch Internal Surveillance Hard Drive (Renewed)	Internal 3.5"	HDD	4 TB 4000 GB	Used	$42.50 /TB	$169.99 as of Sep 12, 2026 10:58 UTC	3 yrs	View
Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 128 MB Cache, 3.5" - WD40EZZX WD40EZZX specifications →	Internal 3.5"	HDD	4 TB 4000 GB	Used	$42.75 /TB	$170.99 as of Sep 12, 2026 10:58 UTC	2 yrs	View
Seagate ST4000DM000 F/W: CC54 4TB Desktop HDD ST4000DM000 specifications →	3.5-inch	HDD	4 TB 4000 GB	Used	$43.00 /TB	$172.00 as of Sep 12, 2026 11:46 UTC	—	View
Seagate ST4000DM000 F/W: CC54 P/N: 1F2168-568 SU S30 4TB Desktop Hard Drive (Renewed) ST4000DM000 specifications →	3.5-inch	HDD	4 TB 4000 GB	Used	$43.00 /TB	$172.00 as of Sep 12, 2026 11:46 UTC	—	View
Seagate ST4000DM000 P/N: 1CD168-568 F/W: CC43 4TB TK (Renewed) ST4000DM000 specifications →	3.5-inch	HDD	4 TB 4000 GB	Used	$43.00 /TB	$172.00 as of Sep 12, 2026 11:46 UTC	—	View
Seagate ST4000DM000 P/N: 1F2168-501 F/W: CC54 SU S30 Desktop HDD 4TB (Renewed) ST4000DM000 specifications →	Internal 3.5"	HDD	4 TB 4000 GB	Used	$43.00 /TB	$172.00 as of Sep 12, 2026 11:02 UTC	3 mo	View
Seagate Exos 7E8 4TB 512n SATA 128MB Cache 3.5-Inch Enterprise Hard Drive (ST4000NM0035), Mechanical Hard Disk	3.5"	HDD	4 TB 4000 GB	Used	$43.75 /TB	$175.00 as of Sep 12, 2026 11:46 UTC	5 yrs	View
Seagate Skyhawk ST4000VX013 4 TB Hard Drive - 3.5" Internal - SATA (SATA/600) - Network Video Recorder, Video Surveillance System Device Supported ST4000VX013 specifications →	3.5-inch	HDD	4 TB 4000 GB	Used	$43.75 /TB	$175.00 as of Sep 12, 2026 11:45 UTC	3 yrs	View

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What We Track

Disk Scout tracks internal & external hard drives, SATA/NVMe SSDs, RAM, memory cards, optical media, and LTO tape — pulled directly from Amazon's live listings and refreshed automatically throughout the day, so the table above reflects real, current prices rather than a stale snapshot.

Explore by Category

NAS Storage

Drives built for 24/7 NAS & RAID workloads

NVMe & SSD

High-performance drives for gaming & workstations

Price per TB

How to read the one number that matters most

Used & Enterprise

Refurbished datacenter drives at a fraction of new

Guides & Buying Advice

All guides

NAS comparison

IronWolf vs IronWolf Pro: When Is Pro Worth It?

Compare exact 4TB and 8TB models, workload ratings, warranty and the cost of upgrading the whole array.

Read guide

NAS comparison

WD Red Plus vs Red Pro: Choose for Your NAS

Compare the operating limits and offer terms that can justify the Pro premium.

Read guide

NAS buying guide

NAS Drive Noise and Power: What to Check Before Buying

Compare exact-model power figures, noise evidence and the annual electricity cost of a multi-drive array.

Read guide

Surveillance

Surveillance HDDs: DVR/NVR Compatibility and Recording Capacity

Choose a CCTV drive by exact model, camera bitrate, recording days, workload and enclosure compatibility.

Read guide

Buying comparison

WD Red Plus vs Seagate IronWolf: Compare the Exact Models

Choosing a home NAS drive? Compare Red Plus and IronWolf by model, RPM, cache, capacity and published NAS limits before checking Amazon offers.

Read guide

Buying comparison

Seagate Exos vs WD Ultrastar: A SATA Buying Comparison

Compare Exos X18 and Ultrastar DC HC550 models for bulk storage. Check SATA versus SAS, sector format, model suffixes and renewed-offer terms.

Read guide

Frequently Asked Questions

Is Disk Scout affiliated with Amazon?

No. Disk Scout is an independent, third-party price tracker. We are not owned by, operated by, or affiliated with Amazon.com, Inc. or its affiliates.

How does Disk Scout make money?

As an Amazon Associate, Disk Scout earns from qualifying purchases when you click through and buy on Amazon. This never affects rankings — every table is sorted purely by price per TB, with no paid placement.

Why do prices differ between regions?

Amazon sets independent pricing, tax, and currency for each marketplace, so the same drive can cost meaningfully different amounts by region. We show each region separately rather than converting to one currency, since live exchange rates would make the comparison misleading.

How often are prices updated?

Every 4 hours, automatically. See our Methodology page for details on how we collect and calculate prices.

What does "price per TB" mean?

Total price divided by usable capacity, so drives of very different sizes can be compared fairly. Full explanation in our price-per-TB guide.

Can I save listings to compare later?

Yes — click the heart icon on any listing to save it locally in your browser (no account needed), then filter to "Saved" to compare your shortlist.