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WD RE WD1003FBYX 1 TB 3.5" Internal Hard Drive
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  • $139.99 
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846996-B21 HP 4TB 7.2K 12Gbps 3.5" SAS Hard Drive 847035-001 765252-001
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  • $105.00 
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Toshiba MK1661GSYB 160 GB 2.5' Internal Hard Drive
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  • $684.10 
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Toshiba X300 Performance SATA III 3.5" Internal Hard Drive - 6TB
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  • $615.30 
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WD AV-25 1 TB AV Hard Drive: 2.5 Inch, 5400 RPM, SATA II, 16 MB Cache - WD10JUCT
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  • $164.99 
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ST8000NM0075 Seagate 8TB 7.2K RPM SAS 12Gbps 3.5" 256MB Internal Hard Drive
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  • $225.00 
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TOSHIBA MG09 Series MG09SCA12TE 12TB 7200 RPM 512MB Cache SAS 12Gb/s 3.5" Hard Drives
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  • $599.99 
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Seagate Skyhawk AI ST10000VE0008 10 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
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  • $703.99 
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Seagate Barracuda ST2000DM001 2 TB 3.5 Internal Hard Drive
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  • $180.99 
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W/estern Digital 80GB UDMA/100 7200RPM 2MB IDE Hard Drive - WD800BB
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  • $73.61 
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  • $66.00 - $73.61
HGST HUS726T6TALE6L4 3.5" 6TB SATA 7.2KRPM 256M 0B36039 512e SE HDD
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  • $499.00 
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Toshiba MG04ACA400N 4tb 7.2k 64mb Sata 6g 3.5in Int Disc Prod Spcl Sourcing See Notes
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  • $299.00 
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0-HOURS HUH721010ALE600 HGST 0F27464 10TB 7.2K RPM 6Gb/s 3.5"SATA HDD Hard Drive
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Toshiba X300 Performance SATA III 3.5" Internal Hard Drive - 4TB
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  • $698.70 
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ST9146853SS-Dell Dell Seagate 146GB 15K 6Gbps SAS 2.5'' Hard Drive ST9146853SS
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  • $19.99 
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ST12000NT001 Seagate IronWolf 12TB 7200RPM SATA 6Gbp/s 256MB 3.5" Hard Drive
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  • $369.00 
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Western Digital 1TB WD1003FZEX-00K3CA0 7200 RPM SATA 6Gb/s 3.5"
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  • $69.00 
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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