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FR6W6 ST1200MM0198 Dell 1.2TB 10K RPM 12Gb/s 2.5" SAS SERVER Hard Drive W/R Tray
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02RR9T 2RR9T ST900MM0006 Dell 900GB 10K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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Dell 2RR9T 02RR9T ST900MM0006 900GB 10K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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NV0G9 ST9500431SS Dell 500GB 7.2K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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GY581 ST373455SS Dell 73GB 15K RPM 3Gbps 3.5" SAS HDD Hard Drive - (ZERO HOURS)
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  • $55.88 
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DELL WD3001BKHG-DELL WD3001BKHG-DELL 300GB 10K SFF SAS HARD DRIVE
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F617N Dell ST3300657SS 15K.7 300GB 15K RPM 6Gb/s 3.5" SAS Hard Drive - (0 HRS)
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Dell T871K 300GB 2.5 6Gb/s SAS - 10k RPM Internal Hard Drive
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HUC101212CSS600-DELL DELL 1.2TB 10K 6GBPS SAS 2.5 Hard Drive
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RC34W 0RC34W Dell ENTERPRISE 900GB 10000RPM 6Gbps 2.5" SAS SERVER HDD Hard Drive
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NP659 MBB2147RC Dell 147GB 10K RPM 3Gb/s SFF 2.5" SAS SERVER HDD HARD DRIVE
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  • $50.00 
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U738K ST31000424SS Dell 1TB 7200RPM 6Gbps NL 3.5"SAS HDD Hard Drive W/ZERO HOURS
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  • $83.88 
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DELL TNTM5 0TNTM5 2TB 7.2K 6G 3.5in SATA Hard Drive MG03ACA200
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0K20K Dell 4TB SATA 3.5" 7.2k 6Gbps Hot Plug Hard Drive WD4000FYYZ
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DELL
0K20K Dell 4TB SATA 3.5" 7.2k 6Gbps Hot Plug Hard Drive WD4000FYYZ
  • Model #: 0K20K-00K20K-WD4000FYYZ-dell-new-1-1
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  • $169.00 
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990FD AL13SXB600N DELL 600GB 15K RPM 6Gbps 2.5" SAS HDD Hard Drive - (0 HOURS)
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9TH066-150 Dell 900GB 10K 6G 64MB 2.5" SAS Hard Drive ST9900805SS
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91K8T ST33000650SS  Dell 3TB 7200RPM 6Gbps 3.5" SAS SERVER HDD Hard Drive
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PGHJG Dell ST300MM0006 300GB 10K 6G 64MB 2.5"SAS SERVER HDD Hard Drive W/(0 HRS)
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Dell R734K 0R734K 500GB 7.2K 6G 16MB 2.5in SAS Hard Drive ST9500430SS
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7YX58 ST600MM0006 Dell 600GB 10000RPM 6Gbps 2.5" SAS SERVER HDD Hard Drive
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V5300 0V5300 ST600MP0005 DELL ENTERPRISE 600GB 15K 6G 2.5" SAS Hard Drive HDD V5
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IBM 81Y9886 3 TB 3.5' Internal Hard Drive
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  • $269.19 
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9XNF6 HUC101812CSS204 Dell 1.2TB 10000RPM 12Gbps 2.5" SAS SERVER HDD Hard Drive
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HUC101212CSS600 T6TWN Dell 1.2TB 10000RPM 6Gbps 2.5" SAS SERVER Hard Drive
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Dell EQL V8 F4VMK 0F4VMK 900GB 10K 12G 2.5" SAS Hard Drive ST900MM0168
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Dell 600GB 10K 2.5" SAS 6Gbps HDD Seagate ST9600205SS // R72NV with Tray
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RC34W 0RC34W AL13SEB900 DELL 900GB 10K 6G SFF 2.5" SAS HARD DRIVE W/TRAY
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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