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0THGNN THGNN Dell ST4000NM0033 4TB 7200RPM 6Gbps 3.5" SATA SERVER HDD Hard Drive
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36GB 15000 RPM 8MB Cache SCSI 3.5" Hard Drives
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Dell CHEETAH 1DKVF ST3300657SS-H 146GB 15K RPM 6Gb/s 3.5" SAS SERVER Hard Drive
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P00JM ST6000NM0024 Dell 6TB 7.2K RPM 6Gb/s 3.5" SATA HDD Hard Drive
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Dell 342-2336 - 3TB 3.5" SAS 7.2K 6Gb/s HS Hard Drive
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Seagate 1TB Desktop HDD Hard Drive - Internal (ST1000DM003)
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Dell 341-8718 146 GB Hard Drive - 3.5" Internal - SAS (3Gb/s SAS)
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HPE ISS 870759-B21 900GB SAS 15K SFF SC DS HDD
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Dell Constellation ES.3 0THGNN 4TB 7.2K 6G 3.5in SATA Hard Drive ST4000NM0033
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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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Dell 400-AUNQ 600 GB Hard Drive - 2.5" Internal - SAS (12Gb/s SAS)
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  • $115.00 
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HGST HD 0B35914 6TB 3.5 256MB 7200RPM SAS 12Gb s 4Kn Ultrastar 7K6 Bare
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  • $175.00 
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HUA722050CLA330 0F12626 HITACHI 500GB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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Maxtor MaXLine III 7L250S0 250GB 7200 RPM 16MB Cache SATA 1.5Gb/s 3.5" Hard Drive Bare Drive
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HTS541010A7E630 HGST Z5K1000 1TB 5400RPM 6Gbps 2.5" SATA HDD Hard Drive 0J43281
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HTS545032A7E680 Hitachi 320GB 5400RPM 6Gb/s 2.5" SATA Hard Drive 0J41953
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HTS727550A9E364 Hitachi 0J18811 500GB 7.2K RPM 3Gb/s 2.5"SATA HDD Hard Drive
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Dell 400-AVBX 2.40 TB Hard Drive - 2.5" Internal - SAS (12Gb/s SAS)
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HTS721010A9E630 HGST 7K1000 1TB 7200RPM 6Gbps 2.5" SATA Laptop HDD Hard Drive
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HTS725032A7E630 HITACHI 0J33233 320GB 7200RPM 3Gbps 2.5" SATA HDD Hard Drive
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HPE 1TB Internal Hard Drive - SATA/600 Controller - 2.5  Internal Drive - 7200rp
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Samsung HD502HJ Spinpoint F3 HD502HJ 500 GB Hard Drive - 3.5" Internal - SATA (SATA/300)
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HP 652757-B21 2TB 7200 RPM SAS 6Gb/s 3.5" LFF SC Midline Hard Drive Bare Drive
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HITACHI DESKSTAR 320GB 7200RPM 16MB CACHE 3.5 INCH SATA HARD DRIVE HDT72532VLA380
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Dell 394XT SATA 2.5 Inch Solid State Drive - 120 GB - 6 Gbps
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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