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Hard Drives - Internal

Need help? Read our Internal Storage Buying Guide

Hard disk drives (HDDs) are used for storing masses of data in your system. They're mechanical, and thus slower than SSDs, but have the benefit of coming in much larger capacities – you can now get 12TB in a single drive. Internal drives come in two main form factors: 3.5in, which you typically use in desktop PCs, and 2.5in, which are usually for laptops, though a range of convertor brackets are also available. Consumer drives typically connect to the system via a SATA cable whereas drives destined for servers sometimes use what is known as a SAS connection.

500GB to 1TB 3.5" SATA Hard Drives

These 3.5" hard drives are available in 500GB, 750GB, and 1TB sizes and mostly utilise the newer SATA III 6Gb/s interface, ensuring as high speeds as possible with their mechanical technology, especially when using them in RAID. They're the most popular drives for today's desktop PCs, thanks to high spindle speeds, lots of cache and huge capacities.

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500GB to 14TB 3.5" SATA CCTV Surveillance Hard Drives

These 3.5” hard drives utilise the SATA III 6Gb/s interface and have been specially designed for write intensive applications such as CCTV recording systems that are active 24 hours a day.

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1TB to 16TB 3.5" SATA Enterprise Hard Drives

These hard drives are specially engineered for maximum reliability and durability for use in mission-critical systems such as servers and workstations. They also typically have a superior warranty to standard consumer-grade hard drives. Choose from a wide variety of capacity points and performance levels.

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1TB to 2TB 2.5" Serial Attached SCSI (SAS) Hard Drives

Serial Attached SCSI (SAS) is a data transfer protocol that is more enterprise focussed than SATA, which is the standard bus for regular consumer drives. Available in 1TB, 1.2TB, 1.8TB and 2TB capacities SAS drives are more expensive per gigabyte, but they offer increased speed, longevity and improved error checking, which is vital for their intended use in enterprise, server and high-end workstation solutions. These 2.5" models are ideal for space-limited situations. Designed to be used with mission critical systems such as servers, high-end work stations or any other users that require the best performance going to improve their systems performance.

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