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Seagate BarraCuda ST500DM009-25PK 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Hard Drive, 25-Pack
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  • $1,245.00 
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Toshiba MG03ACA MG03ACA100 1 TB 3.5" Internal Hard Drive
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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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WD10EADS Western Digital 1TB 5.4K RPM 3Gb/s 3.5" SATA HDD Hard Drive (WD10EADS)
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  • $69.88 
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49Y6003 49Y6002 49Y6006 IBM 4TB 7.2K RPM 6Gb/s 3.5" SATA SERVER HDD Hard Drive
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01GV020 01GV021 01LK820 IBM 1.2TB 10000RPM 12Gbps 2.5" SAS HDD Hard Drive
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01GV020 01GV021 01LK820 IBM 1.2TB 10000RPM 12Gbps 2.5" SAS HDD Hard Drive
  • Model #: 01GV021-01GV020-ST1200MM0009-01LK820-ibm
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  • $199.00 
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Western Digital WD5000LPVT 500GB 5.4K RPM 3Gb/s 2.5" SATA Laptop HDD Hard Drive
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  • $49.88 
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WD2500AAKX Western Digital M4HXR 250GB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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  • $36.88 
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0-HOURS WD1002FBYS Western Digital 1TB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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  • $72.00 
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01AC598 01EJ027 01EJ029 IBM 1.8TB 10000RPM 12Gbps 2.5" SAS SERVER HDD Hard Drive
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BUFFALO OP-HD3.0T/4K-3Y 3TB SATA 3.0Gb/s 3.5" 4K Sector Optional Hard Drive for TeraStation
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  • $174.25 
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WD3000HLHX Western Digital 637004-001 300GB 10KRPM 6Gb/s 3.5"SATA HDD Hard Drive
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  • $54.00 
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WD10EURX Western Digital 1TB 5400RPM 6Gbps 3.5" SATA HDD Hard Drive
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  • $98.95 
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WD5000BPVX Western Digital 500GB 5.4K RPM 3Gb/s 2.5" SATA LAPTOP HDD Hard Drive
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  • $89.88 
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WD2500BPVT Western Digital BLUE 250GB 5.4K RPM 3Gb/s 2.5" SATA Laptop HARD DRIVE
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WD7500BPKT Western Digital BLACK 750GB 7.2K RPM 3Gb/s 2.5" SATA Hard Drive
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  • $63.88 
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Dell 300 GB 2.5" Internal Hard Drive - SAS
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Western Digital WD2500HHTZ 250GB 10,00RPM SATA 6Gb/s 3.5in Hard Drive
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  • $43.95 
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WD5002ABYS Western Digital M020F 500GB 7200RPM 3Gbps 3.5" SATA HDD Hard Drive
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  • $43.88 
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WD3200BEKX Western Digital 320GB 7.2K RPM 6Gbps 2.5" SATA Laptop HDD Hard Drive
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  • $47.88 
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Western Digital XE WD3001BKHG 300GB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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  • $48.88 
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WD5000AADS Western Digital 500GB 5.4K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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  • $59.88 
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WD1600AAKS Western Digital CAVIAR BLUE 160GB 7.2K RPM 3Gb/s 3.5" SATA Hard Drive
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  • $67.88 
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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