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ST3160318AS Seagate 9SL13A-034 160GB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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ST300MM0006 Seagate SAVVIO 9WE066-179 10K.6 300GB 10K 6G 64MB 2.5"SAS Hard Drive
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Dell X162K ST9146852SS 146GB 15K RPM 6Gb/s 2.5" SAS HDD Hard Drive W/Caddy
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UM837 9Z3066-051 DELL 73GB 15K RPM 3Gb/s 3.5" LFF SAS Hard Drive ST373455SS
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7149N-CML ST9600205SS Dell COMPELLENT 600GB 10K 6G 64MB 2.5in SAS Hard Drive
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26K5841 39R7348 IBM 73GB 15000RPM 3Gbps 3.5" HS SAS  Hard Drive HUS153073VLS300
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WD2500AAKX Western Digital M4HXR 250GB 7200RPM 3Gbps 3.5" SATA Hard Drive
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Dell 1KT1K 1 TB 2.5-inch SATA Internal Hard Drive - 5400 RPM
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Western Digital 2060-001292-001 REV A IDE PCB Board Monitor 3.5"
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Dell 341-9875 15000 RPM SAS 6Gb/s 2.5" Internal Hard Drive
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DELL M020F 500GB 7.2K SATA 3.5 LFF 3GBPS HDD W/TRAY X968D WD5002ABYS FOR PE R710
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HP Entry 458945-B21 160GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive
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Dell G731N - Dell 146GB 2.5" SAS 10K 6Gb/s Hard Drive
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ST3808110AS Seagate 9BD131-034 80GB 7200RPM 3Gbps 3.5" SATA HDD Hard Drive
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Seagate ST3146356SS 146GB 15000 RPM SAS 3Gb/s 3.5" Internal 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:

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