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718164-B21 718159-002 HP 1.2TB 10K RPM 6Gb/s Dual Port 2.5" SAS HDD Hard Drive
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Hitachi 14R9464 HDS722525VLSA80 250GB 7.2K RPM 1.5Gbps 3.5" SATA HDD Hard Drive
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  • $67.88 
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Hitachi HTS723232A7A364 320GB 7.2K 3Gb/s 8MB 2.5" SATA Laptop Hard Drive 0J17673
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HUC109090CSS600 0B26054 HGST 900GB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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49Y1860 49Y1859 49Y1856 IBM 300GB 15K RPM 6Gbps Hot Swap 3.5" SAS HDD Hard Drive
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0B27256 HUC109060CSS601 Hitachi 600Gb 10K 6Gb/s 2.5" SAS Hard Drive
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90Y8872 90Y8873 90Y8876 IBM SYSTEM X 600GB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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00AJ122 00AJ121 00AJ125 IBM 500GB 7.2K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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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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01AC594 01EJ005 01EJ009 IBM 300GB 15K RPM 12Gb/s 2.5" SAS SERVER HDD Hard Drive
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00AJ082 00AJ081 00AJ085 IBM 300GB 15K RPM 6Gb/s 2.5" SAS HDD Hard Drive W/Caddy
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0-HOURS 90Y8877 90Y8878 90Y8881 IBM 300GB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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  • $39.00 
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791034-B21 791055-001 HPE 1.8TB 10K RPM 12Gb/s 2.5" SAS HDD Hard Drive
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  • $95.00 
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00AJ097 00AJ096 00AJ100 IBM 300GB 10K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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00RX908 00RY111 00WY600 IBM AHF4 1.8TB 10K RPM 12Gb/s 2.5" SAS HDD Hard Drive
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06P5758 06P5754 IBM 18GB 10K RPM U160 80PIN SCSI 3.5" HDD Hard Drive
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0-HOURS 765873-001 765466-B21 HPE 2TB 7200RPM 12Gbps 2.5" SAS HDD Hard Drive
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00NA232 00NA231 00NA235 LENOVO 600GB 15K RPM 12Gb/s 2.5" SAS HDD Hard Drive
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459319-001 458928-B21 HP 500GB 7200RPM 3Gbps 3.5" SATA SERVER HDD 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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81Y9731 81Y9848 81Y9851 IBM 1TB 7.2K RPM 6Gb/s 2.5" SATA SERVER HDD Hard Drive
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870753-B21 HP 300GB SAS 2.5" 15K 12G G8-G9 Server Hard Drive 867254-001
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HP
870753-B21 HP 300GB SAS 2.5" 15K 12G G8-G9 Server Hard Drive 867254-001
  • Model #: 870753-B21-867254-001-EH0003000JWCPK-atp
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461137-B21 HP MB1000FCWDE 1TB 7.2KRPM 6Gb/s 3.5"SAS SERVERHDD Hard Drive W/Caddy
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0-HOURS IBM 81Y9690 81Y9691 81Y3820 1TB 7.2K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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695507-001 652753-B21 HP 1TB 7.2K RPM 6Gbps 3.5" SAS SERVER HDD Hard Drive
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  • $49.00 - $56.95
614826-001 628180-001 628059-B21 HP 3TB 7.2K RPM 3Gb/s 3.5" SATA HDD 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