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ST320LT007 Seagate 9ZV142-034 320GB 7.2K RPM 3Gb/s 2.5" SATA LAPTOP Hard Drive
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ST3000NM0033 Seagate CONSTELLATION 3TB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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  • $135.00 
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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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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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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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DELL 00Y 500Gb 7200Rpm Sata6Gbps 2.5Inch Low Profile Hard Disk Drive
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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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ST2000NM0105 Seagate ENT 2TB 3.5" SATA 7.2K RMP 6G/s Hard Drive
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453KG DELL AL14SEB060N 600GB 10K RPM 12Gb/s SFF 2.5" SAS SERVER HDD Hard Drive
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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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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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0-HOURS ST9146852SS Seagate 9FU066 146GB 15K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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Seagate ST380013AS 9W2812-351 80GB 7.2K RPM 1.5Gbps 3.5" SATA HDD 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:

Keith V.
4/9/2026 4:20:16 PM
High Capacity Plug and Play Drive

“ SATA so it plugs right into my old media server ”

Seagate BarraCuda ST24000DM001 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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
1/17/2026 7:23:35 PM
Works great if not DOA

“ I initially purchased two drives to replace two old WD 6TB drives (one died before Xmas) in a WD NAS. ”

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX