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516828-B21HP 600GB SAS 3.5" LFF 6Gb/s 15K RPM G1-G7 Hard Drive 517354-001
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516828-B21HP 600GB SAS 3.5" LFF 6Gb/s 15K RPM G1-G7 Hard Drive 517354-001
  • Model #: 516828-B21-517354-001-EF0600FATFF-hp-atp
00AJ092 00AJ091 00AJ095 LENOVO 600GB 10K RPM 6Gb/s G3HS 2.5" SAS 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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IBM 49Y6002 4TB 7200 RPM SATA 3.5" Internal Hard Drive Bare Drive
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  • $310.19 
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508040-001 638516-001 507632-B21 HP 2TB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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  • $144.88 
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6TB SAS 3.5" 7.2K 12G Hard Drive Compatible 400-AHYZ 400-ALCN 400-AIUD 400-ALDU 400-ALCK
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  • $399.00 
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00AJ146 00AJ147 00AJ150 IBM 1.2TB 10K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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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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628182-001 628061-B21 HP 3TB 7200RPM 6Gbps 3.5" SATA SERVER HDD Hard Drive
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  • $67.88 
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614826-001 628180-001 628059-B21 HP 3TB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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  • $164.88 
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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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  • $438.48
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  • $235.00 
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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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  • $89.95 
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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:

Anonymous
6/11/2026 11:04:07 AM
Still working great over a year later

“ it's far more cost effective in 2026 to buy pre-built PCs than trying to build your own with individual parts. ”

Seagate BarraCuda NE-ST8000DM004 8TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
the Muttonmastwer
5/11/2026 11:18:09 AM
Hasn't broken yet

“ I have it attached via USB on my desktop and it has all my work on it, safe from Windoze crash damage or erasure on OS re-installs. ”

WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 16MB Cache 3.5 Inch - WD5000AAKX
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. Compatible and works well. ”

Seagate BarraCuda ST2000DM008 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive