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0U3975 Dell 40Gb 7200-Rpm 3.5-Inch Sata Hard Drive
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Seagate ST3146356SS 146GB 15000 RPM SAS 3Gb/s 3.5" Internal Hard Drive
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QR496A HP 900GB 10K SAS 6G 2 port 2.5" Hard Drive 727290-002 697389-001
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HP M6710 900GB 10000RPM HP M6710 900GB 6G SAS 10K 2.5in HARD DRIVE QR496A
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HP 3PAR M6710 QR496A 697389-001 900GB 6G 10K 2.5" SAS HARD DRIVE 702505-001
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375861-B21 504015-001 HP 72GB 10K RPM 3Gb/s DP 2.5" SAS SERVER HDD Hard Drive
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375861-B21 504015-001 HP 72GB 10K RPM 3Gb/s DP 2.5" SAS SERVER HDD Hard Drive
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ST3500630NS Seagate 9BL146-303 500GB 7200RPM 3Gbps 3.5" SATA HDD Hard Drive
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ST9500420AS Seagate 9HV144-071 500GB 7200RPM 3Gbps 2.5" SATA HDD Hard Drive
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ST9250410ASG Seagate 9PSG42 MOMENTUS 250GB 7200RPM 3Gbps 2.5"SATA HDD Hard Drive
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WD800JD Western Digital  NR694 80GB 7200RPM 1.5Gbps 3.5" SATA HDD Hard Drive
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WD1600BJKT Western Digital J165G 160GB 7200RPM 3Gbps 2.5" SATA Hard Drive
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KN408 0KN408 Dell ST3808110AS 80GB 7200RPM 3Gbps 3.5" SATA HDD Hard Drive
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YJ2KH 0YJ2KH ST300MM0008 Dell 300GB 10K 12G 128MB 2.5in SAS Hard Drive
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HDS721075KLA330 Hitachi DESKSTAR 750GB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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656107-001 655708-B21 HP 500GB 7200RPM 6Gbps 2.5" SATA HDD Hard Drive W/Caddy
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39R7366 26K5511 40K1052 IBM 73.4GB 10K RPM 3Gbps 2.5" SAS Hard Drive W/Caddy
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07YX58 7YX58 ST600MM0006 Dell 600GB 10000RPM 6Gbps  2.5" SAS HDD 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:

the Muttonmastwer
5/11/2026 11:18:09 AM
Hasn't broken yet

“ I have it attached via USB on my desktop and it has all my work on it, safe from Windoze crash damage or erasure on OS re-installs. ”

WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 16MB Cache 3.5 Inch - WD5000AAKX