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07YX58 7YX58 ST600MM0006 Dell 600GB 10000RPM 6Gbps  2.5" SAS HDD Hard Drive
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HP 389346-001 72GB 10000 RPM SAS 2.5" SFF Internal Hard Drive
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HTS542525K9SA00 0A54976 Hitachi 250GB 5400RPM 1.5Gbps 2.5" SATA HDD Hard Drive
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Seagate ST300MM0006 300GB 10000 RPM SAS 6Gb/s 2.5" Savvio 10K.6 Hard Drive
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Lenovo 00FC425 500 GB Thin 2.5-inch SATA 7 mm Internal Hard Drive - 7.2K RPM
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IBM 00Y2429 - 300GB 2.5" SAS 10K 6Gb/s HS Hard Drive
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432320-001 431954-003 DG146ABAB4 HP 146GB 10K RPM 3Gbps 2.5" SAS HDD Hard Drive
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00X3Y DELL 000X3Y 500GB 7.2K SATA 2.5 6Gb/s HDD ST9500620NS
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Dell 250GB 7.2K 3Gbps SATA 2.5 HDD 512n (HC79N)
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ST31000524NS Seagate 9JW154-090 1TB 7200RPM 3Gbps 3.5" SATA HDD Hard Drive
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Seagate BARRACUDA ST1000DM010 2EP102-300 1TB 7.2K RPM 6Gbps 3.5" SATA Hard Drive
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Seagate BARRACUDA ST1000DM010 2EP102-300 1TB 7.2K RPM 6Gbps 3.5" SATA Hard Drive
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652589-B21 HP 900GB 10K 6G SAS 2.5-Inch SFF HDD w/ Smart Carrier 653971-001
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Dell R734K 500GB 7.2k RPM 6Gbps SAS 2.5" Hard Drive w/ Caddy 0R734K
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HP 289042-001 72.8GB 10000 RPM SCSI Ultra320 3.5" Internal Hard Drive
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Western Digital BLUE WD5000AAKX 500GB 7200RPM 6Gb/s 3.5" SATA Hard Drive
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ST31000424SS Seagate 9JX244-031 1TB 7.2K RPM 6Gb/s 3.5" SAS HDD Hard Drive
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FW956 0FW956 DELL ST3300555SS 300GB 15000RPM 3Gbps 3.5" SAS HDD HARD DRIVE
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574270-001 649401-001 574023-B21 HP 500GB 7.2K 3G 3.5" QR MDL SATA Hard Drive
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Dell 9V4PG 1TB SATA 7.2K 6GBPS 3.5" Drive WD10EALX-759BA1
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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