Best internal hard drives 2021. Save all your data

Over time the hard drive of our computer becomes antiquated, gets damaged or just simply can no longer cope with the storage requirements. There are many types of internal hard drives available on the market, and there may be many questions about the technical specifications or the type of characteristics that the internal hard drive should have.

The first step is to be realistic about our needs, as it is not the same to be editor or an audio visual publisher. Each area of work has it's processing requirements and data compilations. If the computer is for family use or for entertainment will also demand specific requirements.

View Details Western Digital Purple 6 TB, Internal, 5400 RPM, 3.5" (WD60PURZ) Hard Drive • 125.99£

Western Digital Purple 6 Tb, Internal, 5400 Rpm, 3.5" (wd60purz) Hard Drive


View Details Western Digital Red 8TB,Internal,5400 RPM,3.5" (WD80EFAX) Hard Drive • 115.17£

Western Digital Red 8tb,internal,5400 Rpm,3.5" (wd80efax) Hard Drive

115.17£ 20 bids | 01d

View Details WESTERN DIGITAL WD Ultrastar DC HC530 14TB SATA 6Gb/s 3.5" Internal Hard Drive • 239.99£

Western Digital Wd Ultrastar Dc Hc530 14tb Sata 6gb/s 3.5" Internal Hard Drive


View Details Western Digital WD Red 8TB WD80EFZX SATA III 3.5" Internal NAS Hard Drive • 169.00£

Western Digital Wd Red 8tb Wd80efzx Sata Iii 3.5" Internal Nas Hard Drive


View Details Seagate Exos X16 14TB 3.5" Internal Hard Drive ST14000NM001G • 274.99£

Seagate Exos X16 14tb 3.5" Internal Hard Drive St14000nm001g



Internal Hdd Hard Drive 3.5" 3tb 7200 Rpm Hp/seagate St33000650ns Server Ideal


View Details Seagate 16TB EXOS X16 Enterprise Internal SATA Hard Drive ST16000NM001G HDD 7.2R • 314.99£

Seagate 16tb Exos X16 Enterprise Internal Sata Hard Drive St16000nm001g Hdd 7.2r


View Details 10 X  1TB 3.5" SATA Hard Drive HDD CCTV DESKTOP PC IMAC - • 399.99£

10 X 1tb 3.5" Sata Hard Drive Hdd Cctv Desktop Pc Imac -


View Details 1TB  Harddrive 2.5 Inch Laptop Or Mac HGST 5K1000-1000x5  • 121.10£

1tb Harddrive 2.5 Inch Laptop Or Mac Hgst 5k1000-1000x5

121.10£ 0 bids | 05d

How to choose the ideal internal hard drive?

Here we present all of the most important variables one should know and consider to choose the divide that best suits your needs.

HDD hard drive vs. SSD hard drive

One of the first decisions of any user before purchasing an internal hard drive is to choose between HDD or SSD.

The HDD (Hard Drive Disk) have mechanical parts, they function via their plaques rotating on a pivot so their heads can read and transcribe data via magnetism.

View Details Seagate IronWolf 16TB Internal 7200RPM 3.5" (ST16000VN001) HDD • 275.00£

Seagate Ironwolf 16tb Internal 7200rpm 3.5" (st16000vn001) Hdd

275.00£ 0 bids | 02d

View Details 25 X 500gb 2.5 Internal SATA HDDs, Seagate, Western Digital, Hitachi • 212.00£

25 X 500gb 2.5 Internal Sata Hdds, Seagate, Western Digital, Hitachi


View Details Seagate SkyHawk 6TB,Internal,8.89 Cm (3.5") (ST6000VX0023) Desktop HDD • 100.00£

Seagate Skyhawk 6tb,internal,8.89 Cm (3.5") (st6000vx0023) Desktop Hdd


View Details Seagate Exos X16 14TB 3.5" Internal Hard Drive ST14000NM001G • 274.99£

Seagate Exos X16 14tb 3.5" Internal Hard Drive St14000nm001g


View Details Western Digital WD Purple 3TB,Internal,5400 RPM,8.89 Cm (3.5")(WD30PURX) (2 HDD) • 100.00£

Western Digital Wd Purple 3tb,internal,5400 Rpm,8.89 Cm (3.5")(wd30purx) (2 Hdd)


View Details 10 X HITACHI / HGST 3TB 7.2K 6Gbps 3.5" SAS Internal HDD HUS723030ALS640 A3 • 132.00£

10 X Hitachi / Hgst 3tb 7.2k 6gbps 3.5" Sas Internal Hdd Hus723030als640 A3

132.00£ 10 bids | 01h

View Details Toshiba N300 8TB NAS 3.5”  INTERNAL HDD • 150.00£

Toshiba N300 8tb Nas 3.5” Internal Hdd


View Details HARD DRIVE Internal 3.5" 1TB 2TB 3TB 4TB 12TB  SATA HDD CCTV DESKTOP PC DVR Lot • 199.99£

Hard Drive Internal 3.5" 1tb 2tb 3tb 4tb 12tb Sata Hdd Cctv Desktop Pc Dvr Lot


View Details Western Digital WD Red 6TB,Internal,5400 RPM,8.89 Cm (3.5") (WD60EFRX) HDD • 130.00£

Western Digital Wd Red 6tb,internal,5400 Rpm,8.89 Cm (3.5") (wd60efrx) Hdd


The SSD (Solid State Drive) are innovative in their technology, they work via flash memories interconnected between themselves to save the information. In this device uses a chip to read and transcribe the data. These hard drives are fast and efficient.

View Details SanDisk SSD PLUS 120GB 240GB 480GB 1TB Sata III 2.5 Inch Internal SSD, 530MB/s • 104.99£

Sandisk Ssd Plus 120gb 240gb 480gb 1tb Sata Iii 2.5 Inch Internal Ssd, 530mb/s


View Details Samsung EVO 870 250GB 500GB 1TB Internal SSD 2.5" SATA3 Intelligent Turbo Write • 127.90£

Samsung Evo 870 250gb 500gb 1tb Internal Ssd 2.5" Sata3 Intelligent Turbo Write


View Details Samsung SSD 860 EVO 250GB 500GB 1TB Internal Solid State Disk Hard Drive UK New • 134.00£

Samsung Ssd 860 Evo 250gb 500gb 1tb Internal Solid State Disk Hard Drive Uk New


View Details Crucial MX500 2TB 2.5 Inch  Internal SSD  • 106.00£

Crucial Mx500 2tb 2.5 Inch Internal Ssd 

106.00£ 22 bids | 01d

View Details Sabrent 1TB Rocket Nvme PCIe 4.0 M.2 2280 Internal SSD *brand New Sealed • 129.00£

Sabrent 1tb Rocket Nvme Pcie 4.0 M.2 2280 Internal Ssd *brand New Sealed


View Details Samsung 870 QVO 8TB 2.5" SATA III Internal SSD (MZ-77Q8T0BW) Brand New Sealed • 500.00£

Samsung 870 Qvo 8tb 2.5" Sata Iii Internal Ssd (mz-77q8t0bw) Brand New Sealed

500.00£ 0 bids | 06d

View Details Samsung 870 QVO 4TB 2.5" SATA III Internal SSD • 309.99£

Samsung 870 Qvo 4tb 2.5" Sata Iii Internal Ssd


View Details Sabrent 1TB Rocket Nvme PCIe 4.0 M.2 2280 Internal SSD (SB-ROCKET-NVMe4-1TB) • 139.00£

Sabrent 1tb Rocket Nvme Pcie 4.0 M.2 2280 Internal Ssd (sb-rocket-nvme4-1tb)


View Details Sabrent Rocket Q 4TB NVMe PCIe M.2 2280 Internal SSD • 429.99£

Sabrent Rocket Q 4tb Nvme Pcie M.2 2280 Internal Ssd


If we take a look at the advantages of each one, we can conclude:

  • The HDD is more economical and has more capacity. However they are slower, louder and require more energy.
  • The SSD are faster when processing information. They are more efficient and last longer. They require less energy, less noisy, but have less storage and they are more expensive in comparison with the HDD.

The best advice we can give you, based on this analysis, are the following:

  • Acquire a SSD hard drive if you need better efficiency.
  • Buy a HDD hard drive if you need greater storage.
  • There is a possibility of combining both: by using the SSD as your principal internal hard drive for you operating system and important programs, and a HDD hard drive for the rest of the information.

Factors that affect the decision

Speed and storage

  • The speed is variable which will determine th type of hard drive needed to read , process and save data. With the HDD the speed is measured in revolutions per minute (rpm) and with SSD in MB/s.
  • In regards to the storage it is referring to the capacity the device has to keep information. There are available hard drives that have 120GB up to 12TB, with a wide range of prices.


There are different interfaces for the connectivity of the hard drives, and this influences the efficiency of these devices.

The DATA format is standard in mechanical hard drives. This format has 3 versions: the DATA1 of 1,5 Gbps in speed is now obsolete. The DATA2 of 3 Gbps and the DATA3 which can have 6 Gbps. Also the NVMe connection is another protocol possibility for the HDD, in this case the speed may go over 2.000 MB/s.

For the SSD hard drives the standard format of connectivity is the M.2. This format is a lot faster that DATA and allows the hard drive to connect to the computer via a PCI-e link. The SSD hard drives can be connected via DATA platform, but this will reduce the processing speed. To maximize the benefits it is vital a M.2 output.

In short:

  • The DATA connection is a popular format for the HDD hard drives, and in turn cost less. They are very compatible, making this device very easy to use.
  • The M.2 connection is ideal to maximize the performance of the SSD hard drives.

Cache memory or buffer

The cache memory or buffer is the nucleus of the hard drive to save the information that is used frequently with the purpose of facilitating it's access. The neewer HDD hard drives can offer a cache memory ranging from 8 MB to 256 MB. Whilst the SSD hard drives offer a cache memory from 32 MB.

The experts recommend a buffer of 32 MB or 64 MB in order to have an optimum performance. At this point it's important to remember one's necessities to adjust the technical aspects to one's needs.

The size

There are hard drives of 2,5 inches which are usually used in portable devices and the 3,5 inch for desktops.

Due to the mechanical characteristics of the HDD hard drives, the bigger the size, the bigger the storage capacity. However,  with the SSD hard drives there is no need for them to be bigger to offer greater speed, therefore most of them are 2,5 inches.

Where to buy the best internal hard drive?

Once all the variables have been analysed, the next step is to choose where to buy online. The hard drives are specialized tools which require a guarantee and security in its acquisition. This is only one of the most important reasons of choosing professional and reliable retailers.

Amazon, eBay or PC World are well established websites and have the best mechanisms to avoid inconveniences when purchasing.

On these websites one can compare different types of internal hard drives thanks to the opinions of other buyers and their rating of each device. These websites also have offers and are the best alternative when purchasing an internal hard drive adjusted to anyone's needs.

By following this advice one can optimize the performance of your computer and enjoy the use of it for longer.