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0H8DVC Dell ST9300653SS 300GB 15K RPM 6Gb/s 64MB SAS 2.5" HDD Hard Drive W/Caddy
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MB8000JFECQ HP G10/G10+ 8-TB 12G 7.2K 3.5 SAS LPc Hard Drive
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HPE 300 GB Hard Drive 2.5" Internal SAS 12Gb/s SAS P40430B21
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Seagate ST1000NM0033 9ZM173-003 1TB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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ST1000LM014 Seagate SSHD 1TB 5.4K RPM 6Gb/s 2.5" SATA SOLID STATE HYBRID DRIVE
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U738K ST31000424SS Dell 1TB 7200RPM 6Gbps NL 3.5"SAS HDD Hard Drive W/ZERO HOURS
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  • $83.88 
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HPE ISS 870759-B21 900GB SAS 15K SFF SC DS HDD
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ST8000NM0075 8TB 7.2K RPM 12G 3.5" SAS HDD For Dell T620 T630 T640 T710
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HUS724030ALS641 HGST Ultrastar 3TB 7.2K SAS 3.5 Hard Drive 0B26929
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  • $34.99 
ST1000LM035 Seagate 1RK172-021 1TB 5.4K RPM 6Gbps 2.5"SATA Laptop HDD Hard Drive
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Dell Toshiba 2TB DT01ACA200 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" 6HFW3
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  • $99.00 
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SEAGATE 18TB EXOS X18 SAS 3.5 512E/4KN
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Western Digital Ultrastar DC HC550 WUH721816AL5204 0F38357 16TB 7.2K RPM SAS 12Gb/s 3.5" Enterprise HDD
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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:

Casey H.
7/21/2025 4:10:23 PM
My "Go To" for HDs

“ These are my "go to" drives for not only internal system drives, but also offloading external storage; using a 4 Bay USB 3.x Drive Cage. ”

Seagate BarraCuda ST4000DM004 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive - OEM