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HP 347708-B22 147GB 15000 RPM Ultra320 SCSI 3.5" Hard Drive Bare Drive
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  • $111.90 
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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 ST91000640SS 9RZ268 1TB 7.2K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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Seagate
Seagate ST91000640SS 9RZ268 1TB 7.2K RPM 6Gb/s 2.5" SAS HDD Hard Drive
  • Model #: ST91000640SS-9RZ268-seagate-newZeroHrs
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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ST500NM0011 Seagate 9YZ162 500GB 7.2K RPM 6Gb/s 3.5"SATA HDD Hard Drive-(0 H0RS)
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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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ST320LT007 Seagate 9ZV142-034 320GB 7.2K RPM 3Gb/s 2.5" SATA LAPTOP Hard Drive
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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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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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Seagate ST380013AS 9W2812-351 80GB 7.2K RPM 1.5Gbps 3.5" SATA HDD Hard Drive
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Seagate Cheetah 15k.7 St3600057ss 600 Gb 3.5 Internal Hard Drive - SAS - 15000-16 Mb Buffer - Ho
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  • $99.00 - $115.00
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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1TB 7.2K RPM SATA 6GBPS 512N
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ST3250310AS Seagate 9EU132 BARRACUDA 250GB 7200RPM 3Gbps 3.5"SATA HDD Hard Drive
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ST3450857SS Seagate 9FM066-038 450GB 15K RPM 6Gb/s 3.5"SAS SERVER HDD Hard Drive
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0-HOURS ST9146852SS Seagate 9FU066 146GB 15K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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ST1200MM0007 Seagate 1DA200 1.2TB 10KRPM 6Gb/s 2.5" SAS HDD Hard Drive - (0 HRS)
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  • $49.00 
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ST2000NM0023 Seagate 9ZM275-031 2TB 7.2KRPM 6Gb/s 3.5"SAS HDD Hard Drive W/0 HRS
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  • $74.00 
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ST2000NM0105 Seagate ENT 2TB 3.5" SATA 7.2K RMP 6G/s 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
ST33000650SS Seagate 9SM260-090 ES.2 3TB 7200RPM 6Gbps 3.5" SAS 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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Seagate ST300MM0006 9WE066-175 300GB 10000RPM 6Gbps 2.5" SAS HDD Hard Drive - (ZERO HOURS)
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  • $47.88 
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0-HOURS ST9600205SS 9TG066 Seagate 600GB 10000RPM 6Gbps 2.5" SAS HDD Hard Drive
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Seagate SAVVIO ST600MM0006 9WG066 600GB 10000RPM 6Gbps 2.5" SAS HDD Hard Drive
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ST2000NX0273 Seagate 2TB SAS 2.5" 7.2K 12Gb 128MB Dual Port Hot-Plug Hard Drive
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HP 600 GB 3.5" Internal Hard Drive
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HPE 626162-001 MM1000EBKAF 1 TB Hard Drive - 2.5" Internal - SATA (SATA/300)
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  • $331.96
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  • $124.19 
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Dell 2T51W 1 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
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HPE ISS 872491-B21 4TB SATA 7.2K LFF SC DS HDD
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00NA492 00NA491 00NA495 IBM 1TB 7.2K RPM 12Gb/s NL 2.5" SAS HDD Hard Drive
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HP 512743-001 72GB 15000 RPM SAS 6Gb/s 2.5" Internal Hard Drive
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  • $48.19 
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HP 286716-B22 147GB 10000 RPM Ultra320 SCSI 3.5" Hard Drive
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  • $88.19 
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HP P2000 AP858A 300GB 15000 RPM SAS 6Gb/s 3.5" Internal Hard Drive
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Seagate ST500VM000 500GB 3.5" SATA 5900rpm Internal Hard Drive - Hot Pluggable
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  • $79.10 
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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