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Seagate BarraCuda ES ST3750641NS 750GB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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  • $80.19 
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HP AW555A 2TB 7200 RPM SAS 6Gb/s 3.5" Internal Hard Drive Bare Drive
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  • $60.19 
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Seagate Pipeline HD ST3320310CS 320GB 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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  • $50.00 
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ST2000NM0105 Seagate ENT 2TB 3.5" SATA 7.2K RMP 6G/s Hard Drive
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ST500NM0011 Seagate 9YZ162 500GB 7.2K RPM 6Gb/s 3.5"SATA HDD Hard Drive-(0 H0RS)
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ST900MM0006 Seagate 9WH066 900GB 10K RPM 6Gb/s 2.5"SAS HDD Hard Drive - (0 HRS)
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  • $42.00 
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0-HOURS ST9146852SS Seagate 9FU066 146GB 15K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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0-HOURS ST600MM0006 Seagate 9WG066 600GB 10K RPM 6Gbps 2.5" SAS HDD Hard Drive
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  • $50.88 
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ST900MM0026 Seagate 900GB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive W/ZERO HOURS
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  • $90.00 
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ST320LT007 Seagate 9ZV142-034 320GB 7.2K RPM 3Gb/s 2.5" SATA LAPTOP Hard Drive
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0-HOURS Seagate ST1000DM003 1ER162-501 1TB 7200RPM 6Gbps 3.5"SATA HDD Hard Drive
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  • $58.88 
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Seagate ST380013AS 9W2812-351 80GB 7.2K RPM 1.5Gbps 3.5" SATA HDD Hard Drive
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ST33000650SS Seagate 9SM260-090 ES.2 3TB 7200RPM 6Gbps 3.5" SAS Hard Drive
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Seagate CHEETAH ST3300657SS 9FL066-005 300GB 15KRPM 6Gb/s 3.5"SAS HDD Hard Drive
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  • $68.00 
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ST3450857SS Seagate 9FM066-038 450GB 15K RPM 6Gb/s 3.5"SAS SERVER HDD Hard Drive
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ST4000NM0023 Seagate 9ZM270 4TB 7200RPM 6Gbps  3.5" SAS HDD Hard Drive
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Seagate
ST4000NM0023 Seagate 9ZM270 4TB 7200RPM 6Gbps 3.5" SAS HDD Hard Drive
  • Model #: ST4000NM0023-9ZM270-seagate-new-zerohrs
Seagate Cheetah 15k.7 St3600057ss 600 Gb 3.5 Internal Hard Drive - SAS - 15000-16 Mb Buffer - Ho
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0-HRS ST1000NM0023 Seagate 9ZM273-001 1TB 7200RPM 6Gbps 3.5" SAS Hard Drive
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Seagate Cheetah 15K.7 ST3450857SS 450 GB Internal Hard Drive (ST3450857SS)
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  • $94.95 
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ST2000NX0273 Seagate 2TB SAS 2.5" 7.2K 12Gb 128MB Dual Port Hot-Plug 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