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3.5 Inch Internal Hard Drives

If you need loads of storage at the best possible price, a 3.5 inch internal hard drive is the smart pick for your desktop. These drives give you massive capacity, often 2TB and up, without the high cost of SSDs, and they’re easy to install in most tower PCs.

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1 - 23 of 23 products
  • Form Factor: 3.5in
  • Rotation Speed: 5900rpm
  • Cache Size: 64MB
  • 3 year warranty
  • Thickness: 26.11mm
SAVE 13%
SAVE £16
£109.97
Black Friday
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  • 8TB Capacity: Vast space for extensive data storage needs
  • 7200rpm Speed: Ensures rapid access and smooth performance
  • AgileArray Technology: Optimised for enhanced NAS performance
  • 24/7 Reliability: Built for constant, dependable use
  • Multi-User Technology: Supports multiple data transactions smoothly
£187.97
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  • 4TB Capacity: Plenty of space for storing important files and data
  • 5400RPM Speed: Ensures reliable performance with efficient data access
  • AgileArray Technology: Optimised for NAS with RAID enhancements
  • 24/7 Performance: Built for constant, dependable use around the clock
  • Multi-User Technology: Supports simultaneous data access by multiple users
£105.97
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  • 6TB Storage Capacity: Ample space for business NAS applications
  • Designed for NAS: Optimised for multi-bay NAS environments
  • AgileArray Technology: Enhances reliability and performance
  • 7200rpm & 256MB Cache: Fast, responsive performance for heavy tasks
  • IronWolf Health Management: Monitors and ensures drive health
SAVE 20%
SAVE £41
£205.99
£164.97
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  • 8TB Capacity: Accommodates large volumes of files and data effortlessly
  • 5400rpm Speed: Ensures steady and reliable data access for all needs
  • 3.5-Inch Form Factor: Standard size for easy desktop upgrades
  • Multi-Tier Caching: Enhances read/write speeds and data flow efficiency
  • Versatile Storage Option: Fits both desktops and all-in-one PCs
£198.97
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  • Form Factor: 3.5in
  • Cache Size: 256MB
  • Thickness: 26.1mm
£177.97
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  • Form Factor: 3.5in
  • Rotation Speed: 7200rpm
  • Cache Size: 256MB
  • Thickness: 26.1mm
SAVE 7%
SAVE £11
£149.99
£138.97
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  • 6TB Capacity: Perfect for home, SOHO, and SMB NAS setups
  • AgileArray Optimised: Enhances performance for multi-bay NAS systems
  • 24/7 Operation: Designed for constant, round-the-clock accessibility
  • 5400 RPM Speed: Balances performance with quieter operation
  • High-Cache Options: Speeds up data access for better response times
SAVE 15%
SAVE £27
£182.38
£154.97
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  • 6TB Capacity: Ample storage for extensive video surveillance data
  • 256MB Cache: Boosts efficiency and access speeds
  • ImagePerfect AI: Ensures seamless video capture 24/7
  • SkyHawk Health Management: Proactive drive health protection
  • RAID RapidRebuild: 3x faster rebuilds for quick data recovery
£136.97
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  • 2TB Capacity: Sufficient space for storing essential files and backups
  • NAS Optimised: Designed for systems with up to 8 bays
  • NASware 3.0: Enhances compatibility and data protection
  • SATA 6Gb/s Interface: Ensures fast and stable data transfers
  • 5400 RPM Speed: Balances performance with quiet operation
SAVE 7%
SAVE £6
£89.99
£83.97
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  • 12TB Storage Capacity: Ample space for extensive video and data storage
  • 7200rpm Rotation Speed: Quick data access for efficient performance
  • Supports 64 HD Cameras: Ideal for AI video analytics systems
  • 550 TB/yr Workload Rate: Designed for high reliability in demanding tasks
  • Enhanced ImagePerfect AI: Zero dropped frames for smooth recording
SAVE 12%
SAVE £35
£292.49
£257.97
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  • 28TB Storage Capacity: Massive space for extensive data storage needs
  • 7200rpm Rotation Speed: Fast data access and improved performance
  • 512MB Cache Buffer: Enhances data transfer speeds and efficiency
  • 12 Gbit/s Interface: Fast connectivity for server and workstation use
  • Reliable Performance: Built for server-grade reliability and longevity
SAVE 5%
SAVE £29
£569.99
£540.97
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  • Form Factor: 3.5in
  • Cache Size: 256MB
  • Thickness: 20.2mm
SAVE 26%
SAVE £38
£145.18
£106.97
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  • 1TB Storage Capacity: Adequate space for essential surveillance footage
  • ImagePerfect Firmware: Ensures seamless 24/7 video recording
  • RAID RapidRebuild: 3× faster rebuilds for reduced downtime
  • SkyHawk Health Management: Actively protects your stored data
  • RV Sensors Included: Maintains performance in multi-bay systems
£58.97
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  • Form Factor: 3.5in
  • Rotation Speed: 5400rpm
  • Cache Size: 256MB
  • 3 year warranty
  • Thickness: 20.2mm
£56.97
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  • Form Factor: 3.5in
  • Rotation Speed: 5400rpm
  • Thickness: 20.2mm
£87.97
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  • 18TB Capacity: Store vast amounts of data efficiently
  • 7200rpm Rotation Speed: Ensures fast and reliable data access
  • 3.5" Form Factor: Fits seamlessly into standard drive bays
  • Helium-Sealed Design: Reduces power usage and weight for savings
  • Seagate Secure Features: Protects data and simplifies drive retirement
SAVE 11%
SAVE £41
£368.39
£326.97
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  • 8TB Storage Capacity: Ideal for extensive surveillance data needs
  • AI Surveillance Optimised: Designed for NVRs with AI edge applications
  • High Reliability: Built for consistent, uninterrupted performance
  • Zero Dropped Frames: Supports heavier workloads smoothly
  • Rotational Vibration Sensors: Ensures stability in multi-bay systems
SAVE 10%
SAVE £22
£215.99
£193.97
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  • Form Factor: 3.5in
  • Rotation Speed: 7200rpm
  • Thickness: 26mm
SAVE 11%
SAVE £31
£289.99
£258.97
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  • Form Factor: 3.5in
  • Rotation Speed: 7200rpm
  • Thickness: 20.2mm
£126.97
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  • Form Factor: 3.5in
  • Rotation Speed: 7200rpm
  • Thickness: 20.2mm
£138.97
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  • 10TB Capacity: Extensive space for all your NAS storage needs
  • 7200rpm Speed: Ensures fast data access and smooth performance
  • NAS Optimisation: AgileArray tech enhances RAID and power efficiency
  • High Cache Options: Speeds up data serving for better user experience
  • Multi-User Technology: Supports simultaneous access without lag
SAVE 10%
SAVE £25
£259.99
£234.97
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  • 2TB Storage for Surveillance: Optimised for up to 64 HD cameras
  • 1M Hour MTBF: Designed for superior reliability and durability
  • ATA Streaming Support: Ensures seamless video streaming
  • Error Recovery Built-In: For uninterrupted video recording
  • Form Factor: 3.5in
£126.97
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Why choose a 3.5 inch hard drive?

If you need big storage without big cost, a 3.5 inch hard drive is the ideal upgrade. It fits into most desktop towers and offers large capacity for photos, videos, games and backups, all at a price that’s much lower than smaller form-factor drives.


What you get with a 3.5 hard drive

A standard 3.5 hard drive brings lots of space, so you don’t keep deleting files to make room. It’s great if you’re archiving family memories, building a large game or media library, or simply want one drive to hold everything. Because an Internal hard drive is designed for desktop use, it stays cool, runs steadily and gives you value for money.


What’s in a 3.5 inch HDD (the tech side)

A 3.5 inch HDD uses the classic SATA interface (typically SATA III) and spins at 5,400 RPM or 7,200 RPM. It’s built for high capacity, not ultra-speed, so it’s perfect for storage rather than extremely fast tasks. Most desktop PCs support these drives easily (many laptops do not). Desktops with 3.5? bays are ideal for large-capacity drives.


When to use a 3.5 SATA HDD and when a smaller drive will do

If you spend your time editing huge video files, collecting games or storing years of Photos, then a 3.5 SATA HDD makes sense. It gives you big capacity at lower cost. But if you use a laptop, switch locations often, or just need a fast drive for everyday files, then a smaller format or even an SSD might be more suitable.

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