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45W9615 IBM ST9300553SS 300GB 15KRPM 6Gbps 2.5"SAS SERVER HDD Hard Drive W/Caddy
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0B31355 IBM 600GB 15K RPM 12Gb/s 2.5" SAS SERVER HDD Hard Drive HUC156060CSS200
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  • $199.00 
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0-HOURS IBM 44W2244 44W2245 44W2248 600GB 15000RPM 6Gbps 3.5" SAS Hard Drive
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81Y9651 81Y9650 IBM SYSTEM X 900GB 10000RPM 6Gbps 2.5" SAS SERVER HDD Hard Drive
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90P1309 90P1305 26K5152 IBM 73.4GB 10K U320 80-Pin 8MB 3.5in SCSI Hard Drive
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00Y2434 00Y2511 00Y5723 IBM 1TB 7200RPM 6Gbps Nearline 2.5" SAS HDD Hard Drive
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81Y9806 81Y9807 81Y3867 IBM 1TB 7.2K RPM 6Gb/s 3.5" SATAII SERVER HDD Hard Drive
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IBM 01EJ584 01EJ715 01EJ863 300GB 15000RPM 12Gbps 2.5" SAS SERVER HDD Hard Drive
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HP 449979-001 160 GB Hard Drive - 3.5" Internal - SATA (SATA/300)
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  • $132.00 
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49Y2052 49Y2048 49Y2051 IBM 600GB 10000RPM 6Gbps 2.5" SAS SERVER HDD Hard Drive
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49Y6211 49Y6210 49Y6214 IBM 4TB 7.2K RPM 6Gb/s 3.5" SAS SERVER HDD Hard Drive
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49Y6211 49Y6210 49Y6214 IBM 4TB 7.2K RPM 6Gb/s 3.5" SAS SERVER HDD Hard Drive
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49Y6211 49Y6210 49Y6214 IBM 4TB 7.2K RPM 6Gb/s 3.5" SAS SERVER HDD Hard Drive
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0B31355 IBM HUC156060CSS200 600GB 15000RPM 12Gbps 2.5" SAS Hard Drive For V5000
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  • $124.00 
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857965-001 857644-B21 HP 10TB SAS 7.2K 12GB/s LFF Hard Drive
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Samsung ST320LM001 320GB 5400RPM 2.5" 8MB Hard Drive FH00J 0FH00J CN-0FH00J
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  • $59.00 
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0B31611 HUC156060CSS200 Lenovo 600GB 15K RPM 6Gb 2.5" SAS SERVER HDD Hard Drive
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  • $172.95 
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00AD075 00AD076 00AD079 IBM 1.2TB 10000RPM 6Gbps G2HS SFF 2.5" SAS Hard Drive
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  • $158.95 - $167.95
HPE 697390-001 2 TB Hard Drive - Internal - Near Line SAS (NL-SAS) (6Gb/s SAS)
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  • $141.19 
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49Y6098 49Y6097 49Y6101 IBM 450GB 15000RPM 6Gbps 3.5" SAS SERVER HDD Hard Drive
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49Y6098 49Y6097 49Y6101 IBM 450GB 15000RPM 6Gbps 3.5" SAS SERVER HDD Hard Drive
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0B26908 IBM HUS724040ALS640 4TB 7.2K RPM 6Gb/s NL 3.5" SAS SERVER HDD Hard Drive
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  • $260.00 
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Dell 400-AUVR 2.40 TB Hard Drive - 2.5" Internal - SAS (12Gb/s SAS)
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  • $218.00 
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730709-001 641552-001 E2D55A HP MSA 300GB 10K RPM 6Gbps DP 2.5" SAS Hard Drive
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  • $185.00 
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HP 1 TB 3.5" Internal Hard Drive
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49Y6003 49Y6002 49Y6006 IBM 4TB 7.2K RPM 6Gb/s 3.5" SATA SERVER HDD Hard Drive
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HPE 581286-B21 768788-002 781577-001 600GB 10000RPM 12Gbps  2.5" SAS SERVER HDD Hard Drive
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  • $117.88 
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IBM 00WG700 00WG701 00WG704 1.2TB 10000RPM 12Gbps 2.5" SAS SERVER HDD Hard Drive
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49Y6098 49Y6097 49Y6101 IBM 450GB 15000RPM 6Gbps 3.5" SAS SERVER HDD Hard Drive
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Dell 400-ATGU DC S4500 480 GB Solid State Drive - 2.5" Internal - SATA (SATA/600)
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  • $410.09 
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HPE 601778-002 2 TB Hard Drive - 3.5" Internal - SATA (SATA/300)
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  • $165.19 
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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