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Seagate ST3250312AS 9YP131-020 FW:HP61 TK 250GB 3.5" Sata Hard Drive, 636927-001
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PGHJG Dell 300-GB 6G 10K 2.5 SP SAS w/F830C
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J770N ST9500530NS Dell 500GB 7200RPM 3Gbps 2.5"SATA SERVERHDD Hard Drive W/RTray
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61XPF ST9146853SS Dell 146GB 15K RPM 6Gbps 2.5" SAS SERVER Hard Drive W/R Tray
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DELL 3TB 3.5 Hard Drive CWJ92 MY58D HUS723030ALS640 7.2K SAS 0CWJ92
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Seagate ST380013AS 9W2812-351 80GB 7.2K RPM 1.5Gbps 3.5" SATA HDD Hard Drive
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Dell Seagate 300GB SAS 10K 6Gb/s 2.5" Hard Drive HDD ST9300603SS C975M w/ Caddy
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Seagate MOMENTUS ST9500325AS 500GB 5400RPM 3Gbps 2.5" SATA Laptop Hard Drive
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JP620 0JP620 ST3146755SS Dell 146GB 10K RPM 3Gb/s 3.5" SAS HDD Hard Drive
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MTV7G 0MTV7G AL13SEB300 Dell 300GB 10000RPM 6Gb/s 2.5" SAS HDD Hard Drive
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HUS724030ALS641 HGST Ultrastar 3TB 7.2K SAS 3.5 Hard Drive 0B26929
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  • $34.99 
HPE 507616-B21 2 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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Seagate Barracuda 500GB 7200RPM 3.5" Internal HDD SATA 6Gb/s ST3500418AS
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Dell 1FF200-151 ST1200MM0088 1.2 TB 12GB 10K, 00GkW7 w/Caddy
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Intel SSDSC2BB120G4 120 GB Solid State Drive - 2.5" Internal - SATA (SATA/600)
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HPE 583711-001 300 GB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
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IBM 139GB 15K SFF-2 2.5 SAS Hard Drive 74Y6481 00E6171 74Y6479
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Seagate ST3300655SS
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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:

Casey H.
7/21/2025 4:10:23 PM
My "Go To" for HDs

“ These are my "go to" drives for not only internal system drives, but also offloading external storage; using a 4 Bay USB 3.x Drive Cage. ”

Seagate BarraCuda ST4000DM004 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive - OEM