Hard Drives - Internal

Internal hard drives are designed to store large amounts of data inside a system. This category includes drives commonly used for archives, media libraries, backups, and projects where capacity is more important than instant access.

In day-to-day use, internal hard drives are appreciated for their practicality. They offer a cost-effective way to keep large files close at hand without relying on external devices. Buyers usually think about capacity, reliability ratings, and rotational speed. Noise and vibration can also influence how a system feels over time.

For dependable, high-capacity storage, internal hard drives remain a widely used and sensible choice.

Need help? Read our Internal Storage Buying Guide

2TB to 4TB 3.5" SATA Hard Drives

HDDs (Hard Disk Drives) are the most cost effective data storage device. While HDDs are considerably slower than SSDs, you get considerably more TB of storage per pound spent.

These 3.5in SATA 3 HDDs are ideal for desktop PCs and external enclosures. They connect to the motherboard using a SATA 3 cable and are intended to be installed in a 3.5in drive bay. These particular SATA 3 HDDs communicate at up to 600MB/s and are have a capacity of up to 4TB.

You can check the compatibility of these HDDs with your system in your component documentation or our buyers guide.

New Refurbished
Refurbished 2TB WD Blue WD20EZBX, 3.5" HDD, SATA III - 6Gb/s, 7200rpm, 256MB Cache, OEMWD Blue 2TB 3.5" SATA 3 HDD/Hard Drive 7200rpm LN176119
Key Specifications
- Refurbished 2TB WD Blue WD20EZBX
- 3.5" HDD
- SATA III - 6Gb/s
- 7200rpm
- 256MB Cache
- OEM
No customer review
Get it Monday, 09 Nov
£113.99
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Black Friday
2TB Seagate BarraCuda ST2000DM008, 3.5" HDD, SATA III - 6Gb/s, 7200rpm, 4.16ms, 256MB Cache, NCQ, OEMSeagate BarraCuda 2TB 3.5" SATA III Desktop HDD/Hard Drive 7200rpm LN92230
Key Specifications
- 2TB Seagate BarraCuda ST2000DM008
- 3.5" HDD
- SATA III - 6Gb/s
- 7200rpm
- 4.16ms
- 256MB Cache
- NCQ
- OEM
Customer Review (126)
Get it Monday, 09 Nov
Was: £124.99£114.98
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Sale
1TB Western Digital Blue WD10EARZ, 3.5" HDD, SATA III 6Gb/s, 5400rpm, 64MB Cache, OEMWestern Digital 1TB Blue 3.5" SATA HDD/Hard Drive LN134411
Key Specifications
- 1TB Western Digital Blue WD10EARZ
- 3.5" HDD
- SATA III 6Gb/s
- 5400rpm
- 64MB Cache
- OEM
No customer review
Get it Monday, 09 Nov
Was: £139.99£129.98
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Offer
2TB WD Blue WD20EZBX, 3.5" HDD, SATA III - 6Gb/s, 7200rpm, 256MB Cache, OEMWD Blue 2TB 3.5" SATA 3 HDD/Hard Drive 7200rpm LN114960
Key Specifications
- 2TB WD Blue WD20EZBX
- 3.5" HDD
- SATA III - 6Gb/s
- 7200rpm
- 256MB Cache
- OEM
Customer Review (21)
Get it Monday, 09 Nov
Was: £145.99£139.99
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2TB Western Digital Blue WD20EARZ, 3.5" HDD, SATA III 6Gb/s, 5400rpm, 64MB Cache, OEMWD 2TB Blue 3.5" SATA HDD/Hard Drive LN134412
Key Specifications
- 2TB Western Digital Blue WD20EARZ
- 3.5" HDD
- SATA III 6Gb/s
- 5400rpm
- 64MB Cache
- OEM
Customer Review (4)
Get it Monday, 09 Nov
£145.99
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Hot Seller
4TB Seagate BarraCuda ST4000DM004, 3.5" HDD, SATA III - 6Gb/s, 5400rpm, 256MB Cache, OEMSeagate BarraCuda 4TB 3.5" SATA HDD/Hard Disk Drive LN83559
Key Specifications
- 4TB Seagate BarraCuda ST4000DM004
- 3.5" HDD
- SATA III - 6Gb/s
- 5400rpm
- 256MB Cache
- OEM
Customer Review (72)
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£159.98
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4TB Western Digital Blue WD40EZZX, 3.5” HDD, SATA III 6Gb/s, 5400rpm, 128MB Cache, OEMWestern Digital WD40EZZX 4TB Blue 3.5” SATA HDD / Hard Drive LN166774
Key Specifications
- 4TB Western Digital Blue WD40EZZX
- 3.5” HDD
- SATA III 6Gb/s
- 5400rpm
- 128MB Cache
- OEM
Customer Review (3)
Get it Monday, 09 Nov
£179.99
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4TB Western Digital Blue WD40EZAX, 3.5” HDD, SATA III 6Gb/s, 5400rpm, 256MB Cache, OEMWestern Digital 4TB Blue 3.5” SATA HDD/Hard Drive LN134410
Key Specifications
- 4TB Western Digital Blue WD40EZAX
- 3.5” HDD
- SATA III 6Gb/s
- 5400rpm
- 256MB Cache
- OEM
Customer Review (4)
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£185.99
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5TB to 32TB 3.5" SATA Hard Drives

HDDs (Hard Disk Drives) are the most cost effective data storage device. While HDDs are considerably slower than SSDs, you get considerably more TB of storage per pound spent.

You can check the compatibility of these HDDs with your system in your component documentation or our buyers guide.

Offer
3TB WD Blue WD30EZZX, 3.5” HDD, SATA III 6Gb/s, 5400rpm, 128MB Cache, OEMWD 3TB Blue 3.5” SATA HDD/Hard Drive LN168632
Key Specifications
- 3TB WD Blue WD30EZZX
- 3.5” HDD
- SATA III 6Gb/s
- 5400rpm
- 128MB Cache
- OEM
Customer Review (2)
Get it Monday, 09 Nov
Was: £139.99£129.98
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Sale Refurbished
Refurbished 6TB Western Digital Blue WD60EZAX, 3.5” HDD, SATA III 6Gb/s, 5400rpm, 256MB Cache, OEMRefurbished Western Digital 6TB Blue 3.5” SATA HDD/Hard Drive LN174501
Key Specifications
- Refurbished 6TB Western Digital Blue WD60EZAX
- 3.5” HDD
- SATA III 6Gb/s
- 5400rpm
- 256MB Cache
- OEM
No customer review
Get it Monday, 09 Nov
Was: £229.99£221.99
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Get it Monday, 09 Nov
6TB Western Digital Blue WD60EZAX, 3.5” HDD, SATA III 6Gb/s, 5400rpm, 256MB Cache, OEMWestern Digital 6TB Blue 3.5” SATA HDD/Hard Drive LN134413
Key Specifications
- 6TB Western Digital Blue WD60EZAX
- 3.5” HDD
- SATA III 6Gb/s
- 5400rpm
- 256MB Cache
- OEM
Customer Review (2)
Get it Monday, 09 Nov
£249.98
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Offer
8TB Seagate ST8000DM004, BarraCuda 3.5" HDD, SATA III 6Gb/s, 5400rpm, 256MB Cache, NCQ, OEMSeagate BarraCuda 8TB 3.5" SATA HDD/Hard Drive LN88059
Key Specifications
- 8TB Seagate ST8000DM004
- BarraCuda 3.5" HDD
- SATA III 6Gb/s
- 5400rpm
- 256MB Cache
- NCQ
- OEM
Customer Review (61)
Get it Monday, 09 Nov
Was: £269.99£249.98
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Refurbished
Refurbished 8TB Western Digital Blue WD80EAAZ, 3.5” HDD, SATA III 6Gb/s, 5640rpm, 256MB Cache, OEMRefurbished WD 8TB Blue 3.5” SATA HDD/Hard Drive LN174502
Key Specifications
- Refurbished 8TB Western Digital Blue WD80EAAZ
- 3.5” HDD
- SATA III 6Gb/s
- 5640rpm
- 256MB Cache
- OEM
No customer review
Get it Monday, 09 Nov
£299.99
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Offer
8TB Western Digital Blue WD80EAAZ, 3.5” HDD, SATA III 6Gb/s, 5640rpm, 256MB Cache, OEMWD 8TB Blue 3.5” SATA HDD/Hard Drive LN148000
Key Specifications
- 8TB Western Digital Blue WD80EAAZ
- 3.5” HDD
- SATA III 6Gb/s
- 5640rpm
- 256MB Cache
- OEM
No customer review
Get it Monday, 09 Nov
Was: £359.99£313.99
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8TB Toshiba MG10ADA800E Enterprise Hard Drive, 3.5" HDD, SATA III 6Gb/s, 7200rpm, 512MB Cache, 512E/4096N, OEM, CMRToshiba MG10ADA800E 8TB Enterprise / NAS Hard Drive/HDD 7200rpm LN158027
Key Specifications
- 8TB Toshiba MG10ADA800E Enterprise Hard Drive
- 3.5" HDD
- SATA III 6Gb/s
- 7200rpm
- 512MB Cache
- 512E/4096N
- OEM
- CMR
Customer Review (10)
Get it Monday, 09 Nov
£439.99
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10TB WD Blue WD100EAGZ, 3.5” HDD, SATA III 6Gb/s, 7200rpm, 512MB Cache, OEMWD 10TB Blue 3.5” SATA HDD/Hard Drive LN168631
Key Specifications
- 10TB WD Blue WD100EAGZ
- 3.5” HDD
- SATA III 6Gb/s
- 7200rpm
- 512MB Cache
- OEM
Customer Review (1)
Get it Monday, 09 Nov
£479.99
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Offer
12TB WD Blue WD120EAGZ, 3.5” HDD, SATA III 6Gb/s, 7200rpm, 512MB Cache, OEMWD 12TB Blue 3.5” SATA HDD/Hard Drive LN168838
Key Specifications
- 12TB WD Blue WD120EAGZ
- 3.5” HDD
- SATA III 6Gb/s
- 7200rpm
- 512MB Cache
- OEM
No customer review
Get it Monday, 09 Nov
Was: £569.99£529.99
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16TB Seagate ST16000DM001, BarraCuda 3.5" HDD, SATA III 6Gb/s, 7200rpm, 512MB Cache, OEMSeagate BarraCuda 16TB 3.5" SATA HDD / Hard Drive LN162230
Key Specifications
- 16TB Seagate ST16000DM001
- BarraCuda 3.5" HDD
- SATA III 6Gb/s
- 7200rpm
- 512MB Cache
- OEM
Customer Review (5)
Call for price
20TB Seagate ST20000DM001, BarraCuda 3.5" HDD, SATA III 6Gb/s, 7200rpm, 512MB Cache, OEMSeagate BarraCuda 20TB 3.5" SATA HDD / Hard Drive 7200rpm LN162231
Key Specifications
- 20TB Seagate ST20000DM001
- BarraCuda 3.5" HDD
- SATA III 6Gb/s
- 7200rpm
- 512MB Cache
- OEM
Customer Review (4)
Get it Monday, 09 Nov
£659.99
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24TB Seagate ST24000DM001, BarraCuda 3.5" HDD, SATA III 6Gb/s, 7200rpm, 512MB Cache, CMR, OEMSeagate BarraCuda 24TB 3.5" SATA HDD/Hard Drive 7200rpm LN161100
Key Specifications
- 24TB Seagate ST24000DM001
- BarraCuda 3.5" HDD
- SATA III 6Gb/s
- 7200rpm
- 512MB Cache
- CMR
- OEM
Customer Review (9)