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55H49 ST3000NM0023 Dell CONSTELLATION 3TB 7200RPM 6Gbps 3.5" SAS Hard Drive
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HKK8C PX02SMF040 Dell 400GB eMLC 12G Hot Swap 2.5in SAS Solid State Drive (SSD)
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  • $276.88 
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WD5000BPKX Western Digital BLACK 500GB 7.2K RPM 6Gbps 2.5" SATA HDD Hard Drive
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  • $54.94 
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ST3000NM0033 Seagate CONSTELLATION 3TB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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  • $135.00 
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1T8KW DELL 1.2TB SAS 2.5" 10K 12Gb/s HUC101812CSS204 0B31870 SERVER HDD Gen13
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  • $230.00 
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Dell 1.8TB 10K 12Gbps SAS 2.5 HDD 512e (0WRRF) New
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HDEPQ00DLA51 Dell 4TB 7.2K SATA 6G LFF Hard Drive
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WD6400AAKS Western Digital C118D 640GB 7200RPM 3Gbps 3.5" SATA HDD Hard Drive
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1VD100-136 Dell 2TB 7.2K SATA 6G SFF Server Hard Drive
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ST1000VM002 Seagate 1ET162-501 1TB 5.9K RPM 6Gb/s 3.5" SATA HDD Hard Drive
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ST2000NM0001 Seagate 9YZ268-001 2TB 7200RPM 6Gbps 3.5" SAS HDD Hard Drive
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1D0F5 Dell 2.4TB SAS 2.5" 10K 12G G14-G16 Hard Drive ST2400MM0159
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DELL
1D0F5 Dell 2.4TB SAS 2.5" 10K 12G G14-G16 Hard Drive ST2400MM0159
  • Model #: 1D0F5-01D0F5-dell-ST2400MM0159-new-atp
Seagate Exos 20TB 7.2K RPM SATA 6Gb/s 3.5in Enterprise HDD ST20000NM002C
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  • $539.99 
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Western Digital WD40EZRX?CAREEXT 4TB 3.5" Internal Hard Drive
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  • $179.00 
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846524-B21 846523-001 HPE 1TB 7.2K RPM 12Gbps 3.5" SAS HDD Hard Drive W/Caddy
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  • $88.95 
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Dell WD2003FYYS-18W0B0
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DELL
Dell WD2003FYYS-18W0B0
  • Model #: IE1F2-00-B007N-1
Seagate ST3300555SS 9DJ066-051 300GB 15K RPM 3Gb/s 3.5" SAS HDD Hard Drive
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ST4000NM0023 Seagate 9ZM270 4TB 7.2K RPM 6Gb/s 3.5" SAS Hard Drive
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  • $99.00 
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Dell 300 GB 3.5" Internal Hard Drive F617N
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759548-001 759212-B21 HP 600GB 15K 12G SAS 2.5" Hard Drive
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EH000300JWHPL HPE 300GB 15K 12G SFF SAS SC Hard Drive
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Desktop internal hard drives store operating systems, system files, software and individual files. They can offer anywhere from 500GB of storage up to 8TB or more and come with a variety of interfaces. Although most internal drives are 3.5in., some devices use a smaller 2.5in. form factor. Smaller and larger physical sizes are rare but do exist. Also, consider the speed of the drive. Internal hard drives for desktop computers tend to run at 7,200 revolutions per minute (RPM) but faster read-write speeds minimize waiting time. Hard drives with speeds of up to 15,000 RPM are available. Finally, memory cache is the amount of memory that can be active at any given time. A larger cache is important if you work with multiple large files at once.

Improve Your Computer's Performance with a New Hard Drive

You might not be concerned about storage space when you buy a new PC, but the hard drive will fill will with files and software. A new desktop internal hard drive can replace an existing drive that has reached maximum capacity. Alternatively, if your motherboard has a spare bay, you can add a second or additional device to expand storage. An internal HDD for PCs is easy to install, has greater capacity and speed than an external device and comes with multiple storage options.

Store All Your Data with Large Capacity Drives

Every piece of software you install, every song you save, every video you download takes up storage space, which can slow down a computer. A 720p movie takes up approximately 8GB, while a 4k video can consume as much as 100GB of a desktop internal hard drive. Even the Windows 10 operating system requires 15GB. A 500GB hard drive can be useful for storing files while you're on the move before transferring them to a larger drive if you don't have a personal cloud device or portable hard drive. For everyday and ongoing storage, this size drive will quickly fill up. Desktop internal hard drives offer the storage of up to 16TB in some cases, providing plenty of space for software and files.

Ensure Compatibility by Choosing the Right Interface

The most commonly used standards for connecting a desktop internal hard drive to a motherboard are SATA and SAS. Determine the motherboard's interface and ensure that you match this when buying a new drive to ensure compatibility and to avoid having to use an adapter. Check the label off the drive you are replacing or look at the manufacturer guidelines for your motherboard.

Access Data Quicker with a Fast SATA Internal Hard Drive

The speed the disk platters spin determines how quickly information can be retrieved from the drive. It is common for external hard drives to have a speed of 5,000 RPM because this draws less power and makes minimal noise. Other hard drive designs have a speed of up to 15,000 RPM, depending on the model.

Bestselling Desktop Internal Hard Drives Reviews:

Perry K.
3/26/2026 7:05:57 AM
Seagate Barracuda 2TB Hard Drive

“ Received and installed new Seagate Hard Drive in older Dell Inspiron PC. ”

Seagate BarraCuda ST2000DM008 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
Anonymous
1/22/2026 4:08:37 PM
Perfect 28TB NAS Drives Great For UGREEN Plex

“ One drive is my primary Plex/media volume, the other is my internal backup. ”

Seagate IronWolf Pro ST28000NT000 28TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive