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Dell 01KWKJ 500Gb 7200RPM 1KWKJ Sata ii 64Mb 3.5" HDD W/TRAY x968d Server
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Seagate Constellation ES Hard Drive ST3000NM0023 (ST3000NM0023)
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IBM ST9300653SS 00Y2428 300GB 15K RPM 6GB SAS 2.5'' Hard Drive
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HP 512744-001 146GB 15000 RPM SAS 6Gb/s 2.5" Internal Hard Drive
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0-HRS ST600MM0026 Seagate 9WL066 10K.6 600GB 10KRPM 6Gb/s 2.5"SAS HDD Hard Drive
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WD7500AALX Western Digital 750GB 7.2K RPM 6Gb/s 3.5" SATA HDD Hard Drive
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HDS721050CLA662 Hitachi 0F15012 500GB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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0B25662 HUC106060CSS600 HITACHI 600GB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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HUC109090CSS600 0B26054 HGST 900GB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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IBM 45K0408 45K0403 Seagate 250GB 3.5" SATA II 7.2K Hard Drive, ST3250318AS
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250GB Dell XT213 Seagate ST3250310AS 3.5" SATA Hard Drive HDD 0XT213 9EU132-037
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Western Digital WD2503ABYX-01WERA0 250GB Sata Hard Drive DCM: HHRNHTJAH
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Dell AL13SEB300 MTV7G 0MTV7G 300GB SAS 2.5" 10K Hard Drive W/O Tray
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Dell 512 GB Solid State Drive M79KSF51272AZ
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432322-001 431933-B21 HP 36GB 15K RPM 3Gb/s 2.5" SAS SERVER HDD Hard Drive
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IBM 43W7523 73GB 15000 RPM SAS 3.5" Internal Hard Drive
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SEAGATE BULK ST1000NM0055 1TB Exos 3.5 512n SATA
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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