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HP 574270-001 500GB 7.2K 3G 16MB 3.5in QR MDL SATA Hard Drive ST500NM0011
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90Y8953 90Y8954 90Y8957 IBM SYSTEM X 500GB 7200RPM 6Gbps 2.5" SAS HDD Hard Drive
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49Y1865 49Y1861 49Y1864 IBM SYSTEM 450GB 15000RPM 6Gbps 3.5" SAS HDD Hard Drive
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81Y9875 81Y9872 81Y9885 IBM 1TB 7.2K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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06P5759 06P5755 IBM 36.4GB 10K RPM U160 SCSI 80-Pin Hot Swap 3.5in Hard Drive
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HPE AW612A 450 GB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
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IBM 90Y8930 146 GB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
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IC35L146UCDY10 07N8808 IBM 146GB 10K 8MB Ultra320 80-Pin 3.5" SCSI Hard Drive
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44W2235 44W2234 44W2238 IBM 300GB 15000RPM 6Gbps 3.5" SAS SERVER HDD Hard Drive
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49Y1870 49Y1869 49Y1866 IBM 600GB 15000RPM 6Gbps 3.5" SAS SERVER HDD Hard Drive
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0B24484 HUS156060VLS600 IBM 600GB 15000RPM 6Gbps 3.5" SAS SERVER HDD Hard Drive
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Seagate ST9600105SS - Seagate 600GB 2.5" SAS 10K 6Gb/s Hard Drive
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  • $194.45 
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233349-001 HP 72.8GB 10000RPM Wide Ultra320 3.5" SCSI Hard Drive BD0726SA22
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  • $48.88 
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01EJ586 01EJ719 01EJ865 LENOVO 900GB 10K RPM 12Gb/s SFF 2.5" SAS HDD Hard Drive
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0B23723 HITACHI HUC151414CSS60 ULTRASTAR 147GB 15K 6G 64MB 2.5in SAS Hard Drive
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  • $75.88 
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697574-B21 697631-001 HP 1.2TB 10000RPM 6Gbps 2.5" SAS SERVER HDD Hard Drive
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  • $55.00 
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HTS545050A7E362 0J38105 HGST 500GB 5400RPM 3Gbps 2.5" SATA Laptop HDD Hard Drive
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  • $54.88 
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49Y6102 49Y6103 49Y6106 IBM 600GB 15K RPM 6Gb/s 3.5" SAS SERVER HDD Hard Drive
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81Y9893 81Y9915 81Y9918 IBM 900GB 10K RPM 6Gb/s 2.5" SAS Hard Drive 0-HOURS
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Seagate Savvio 10K.6 SAS 6GBS 600GB (ST600MM0006)
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867269-B21 765252-001 HPE 4TB 7.2K RPM 12Gbps Midline 3.5" SAS Hard Drive
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90Y9001 00W1160 00W1163 IBM 600GB 10K 6G 2.5" SAS Hard Drive For DS3524/EXP3524
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LOT OF 10-Dell W330K HUC151414CSS600 146GB 15K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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01AC597 01EJ022 01EJ024 IBM 1.2TB 10000RPM 12Gbps 2.5" SAS SERVER HDD Hard Drive
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XK112 HUC101414CSS300 Dell 146GB 10K RPM 3Gb/s 2.5"SFF SAS HDD HardDrive W/Caddy
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39R7338 26K5836 40K1038 IBM 73.4GB 10000RPM Ultra-320 2.5" SCSI HARD DRIVE
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HPE 482481-001 GB0160EAFJE 160 GB Hard Drive - 3.5" Internal - SATA (SATA/300)
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IBM 00AK374 00NC603 00Y5909 600GB 15K RPM 12Gb/s 2.5" SAS SERVER HDD Hard Drive
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IBM 00AJ127 00AJ126 00AJ130 600GB 15K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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0B24484 HUS156060VLS600 IBM 600GB 15000RPM 6Gbps 3.5" SAS Hard Drive
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Samsung ST320LM001 320GB 5400RPM 2.5" 8MB Hard Drive FH00J 0FH00J CN-0FH00J
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HPE 571517-001 250 GB Hard Drive - 3.5" Internal - SATA (SATA/300)
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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