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IBM 42D0787 2 TB 3.5' Internal Hard Drive
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  • $580.30 
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376596-001 375859-B21 HP 36GB 2.5" SFF SAS 3Gb/s 10K RPM DG036A9BB6 Hard Drive
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  • $81.00 
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574270-001 649401-001 574023-B21 HP 500GB 7.2K RPM 3Gbps 3.5" SATA Hard Drive
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  • $32.95 
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574270-001 649401-001 574023-B21 HP 500GB 7.2K RPM 3Gbps 3.5" SATA Hard Drive
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  • $32.95 
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0F14685 HUS724020ALE640 HGST 2TB 7.2K RPM 6Gb/s 3.5" SATA HDD Hard Drive
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  • $74.88 
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HCS721050CLA362 0F13836 Hitachi 500GB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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  • $59.88 
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0A79646 HTS723232A7A364 Hitachi 320GB 7.2K RPM 3Gb/s 2.5" SATA HDD Hard Drive
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  • $51.88 
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81Y9726 81Y9727 81Y3857 IBM 500GB 7.2K RPM 6Gb/s 2.5" SATA SERVER HDD Hard Drive
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HTS725032A7E635 0J38653 HGST 320GB 7.2K RPM 6Gb/s 2.5" SATA LAPTOP Hard Drive
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  • $41.88 
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0A39514 HDE721010DLA330 Hitachi DESKSTAR 1TB 7.2K RPM 3Gb/s 3.5" SATA Hard Drive
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  • $59.88 
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458941-B21 649401-001 HP 500GB 7.2K RPM 3Gb/s 3.5" SATA SERVER HDD Hard Drive
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  • $69.88 
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9WG066-039 IBM ST600MM0066 600GB 10K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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  • $80.00 
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00AJ092 00AJ091 00AJ095 LENOVO 600GB 10K RPM 6Gb/s G3HS 2.5" SAS HDD Hard Drive
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LOT OF 10 - T871K ST9300603SS Dell 300GB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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00AR327 00AR400 00AR480 IBM 1.2TB 10K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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0B26018 IBM 900GB 10K RPM 6Gb/s 15MM HS 2.5" SAS HDD Hard Drive HUC109090CSS600
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HPE Server Options 818365-B21 2 TB 3.5 in. Internal Hard Drive - SAS - 7200 RPM - Hot Pluggable - 1 Pack
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0-HOURS 00AJ087 00AJ086 00AJ090 LENOVO 1TB 7.2K RPM 6Gb/s 2.5" SAS Hard Drive
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375861-B21 504015-001 HP 72GB 10K RPM 3Gb/s DP 2.5" SAS SERVER HDD Hard Drive
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  • $28.10 
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375861-B21 504015-001 HP 72GB 10K RPM 3Gb/s DP 2.5" SAS SERVER HDD Hard Drive
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  • $33.88 
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375861-B21 504015-001 HP 72GB 10K RPM 3Gb/s DP 2.5" SAS SERVER HDD Hard Drive
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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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581311-001 581286-B21 HP 600GB 10K RPM 6Gb/s 2.5" SAS SERVER HDD HARD DRIVE
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  • $62.88 
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42D0677 42D0678 42D0681 IBM 146GB 15K RPM 6Gb/s SFF 2.5" SAS HDD Hard Drive
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Seagate ST9600105SS - Seagate 600GB 2.5" SAS 10K 6Gb/s 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:

Perry K.
3/26/2026 7:05:57 AM
Seagate Barracuda 2TB Hard Drive

“ Received and installed new Seagate Hard Drive in older Dell Inspiron PC. ”

Seagate BarraCuda ST2000DM008 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
Anonymous
1/22/2026 4:08:37 PM
Perfect 28TB NAS Drives Great For UGREEN Plex

“ One drive is my primary Plex/media volume, the other is my internal backup. ”

Seagate IronWolf Pro ST28000NT000 28TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive