18tb internal hard drive comparison - September 2026

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Last updated on 02.09.2026

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UGREEN NASync DXP2800 2-Bay Desktop NAS, Dual NVMe Slots NAS Server Storage | Intel N100 Quad-Core Processor, 8GB DDR5 RAM, 2.5GbE Ethernet, 4K HDMI, Cloud Backup,Office Network Nas Storage (Diskless)

UGREEN

15% off

free shipping

To the product (1 offer)

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WD 18TB Elements Desktop External Hard Drive - USB 3.0, Black

Western Digital

free shipping

To the product (11 offers)

9,9

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Seagate 8TB BarraCuda Internal Hard Drive | SATA 6 Gb/s (ST8000DMZ04) | 5400 RPM. Desktop HDD for everyday PC storage, gaming, & computing. Trusted reliability with 2-Year Warranty + 2-Year Rescue

Seagate

6% off

free shipping

To the product (1 offer)

9,8

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WD_BLACK C50 2TB Game Drive for Xbox Series X|S, Officially Licensed, Plug-and-Play, Quick Resume. Xbox Velocity Architecture, Save Games

WD_BLACK

7% off

free shipping

To the product (1 offer)

9,7

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03hours

20minutes

26seconds

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Toshiba 18TB Enterprise Internal Hard Drive – MG Series 3.5" SATA HDD for Server, Storage, 24/7 Operation, Hyperscale, Cloud (MG09ACA18TE)

Toshiba

free shipping

To the product (8 offers)

9,7

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Seagate Enterprise 3.5" 18000 GB 7200 RPM 18 TB 3.5" 7200 RPM SATA ST18000NM00J (Renewed)

Amazon Renewed

free shipping

To the product (1 offer)

9,6

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UnionSine External Hard Drive 14TB 3.5" Desktop HDD USB3.0 Storage Compatible for PC, Mac, TV, Desktop, Laptop(Black) HD3513

UnionSine

free shipping

To the product (1 offer)

9,5

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WD 24TB My Book external hard drive, Desktop HDD with Password Protection, USB 3.0, SuperSpeed USB, software for device management, backup, hardware encryption, works with PC and Mac, Black

9% off

free shipping

To the product (2 offers)

9,4

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SIMPLETEK - 18TB 3.5" SATA III internal hard drive with 512MB cache — designed for smart video recorders (Refurbished)

SIMPLETEK

free shipping

To the product (1 offer)

9,4

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WD Red Pro 18TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache

Western Digital

free shipping

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9,2

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Seagate 24TB IronWolf Pro Internal NAS Hard Drive | SATA (ST24000NTZ02) | 7200 RPM. Professional NAS HDD. 24/7 performance, AgileArray, All-CMR, 550TB/year, health monitoring.

Seagate

4% off

free shipping

To the product (1 offer)

9,2

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You might also be interested in these 18tb internal hard drive.

WD HGST 12TB HUH721212ALE601 7200RPM Ultarstar SATA 6Gb/s 256MB Hard Drive 0F29591

Provides 50% more capacity than 8TB drives

£ 336.99 free shipping

To the product (1 offer)

25% off

TERRAMASTER F8 SSD Plus NAS 8Bay Intel Core i3 8-Core, 16GB DDR5 (Diskless) | 10GbE Port, All SSD NAS, 8 Heat Sinks Included, Palm-Sized Network Attached Storage Peak Performance

TERRAMASTER

£ 614.99 free shipping

To the product (1 offer)

HIHSYEWYB For HDD 18TB SATA 7200 3.5'' NAS Server Hard Drive ST18000NM003D

HIHSYEWYB

£ 1,148.00 free shipping

To the product (1 offer)

Acer FA200 M.2 2280 SSD 4TB: PCIe 4.0 NVMe Gen4x4 with HMB & SLC, Up to 7200 MB/s Read Speed, Internal Solid State Drive for Laptop, Desktop PC & PS5 Compatible

Acer

£ 409.69 free shipping

To the product (1 offer)

Toshiba N300 18TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWG51JXZSTA

Toshiba

£ 684.99 free shipping

To the product (1 offer)

Asustor Lockerstor 10 AS6510T 10 Bay NAS Enclosure - Network Attached Storage, Quad Core 2.1GHz CPU, 8GB RAM DDR4, M.2 NVMe SSD Caching (Diskless)

Asustor

£ 1,149.00 free shipping

To the product (1 offer)

Ooper Seaagate Skyhawk AI 10 TB Video Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s 256 MB Cache for DVR NVR Security Camera System with 3-Years Data Recovery Services ST10000VE001

Ooper

£ 506.76 free shipping

To the product (1 offer)

Seagate IronWolf PRO 18TB Interne Festplatte CMR 3.5 Zoll SATA III 256 MB, ST18000NE000 (Renewed)

Amazon Renewed

£ 595.00 free shipping

To the product (1 offer)

Synology HAT5300 16TB 3.5" 7200rpm SATA HDD; Designed for 24/7 environments

Synology

£ 510.68

To the product (8 offers)

HGST

£ 410.87 free shipping

To the product (1 offer)

14% off

Seagate 8TB IronWolf Internal NAS Hard Drive | SATA 6 Gb/s (ST8000VNZ02) | 5400 RPM. 24/7 NAS-optimized HDD. AgileArray, All-CMR, RV sensors for multi-bay, 180TB/year. 3-Year Warranty + 3-Year Rescue

Seagate

£ 335.04 free shipping

To the product (2 offers)

WD Red Pro 10TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 256MB Cache

Designed specifically with medium or large scale business customers in mind, WD Red Pro drives are available for up to 24-bay NAS systems.

£ 379.00 free shipping

To the product (1 offer)

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18tb internal hard drive in comparison

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