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Seagate 1TB BarraCuda 7200 RPM 128MB Cache SATA 6.0Gb/s 2.5" Laptop Internal Hard Drive ST1000LM049
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  • $90.00 - $105.00
ST6000NM0095 Seagate 6TB 7.2K RPM SAS 12Gbps 3.5" 256MB Internal Hard Drive
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  • $160.00 
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HPE 507616-B21 2 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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  • $34.99 
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Seagate ST8000NM0075 1RM212-001 8TB 7.2K RPM 12Gb/s 3.5"SAS HDD Hard Drive-0 HRS
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  • $255.00 
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IBM 42D0777 1TB 7200 RPM SAS 600 Serial Attached SCSI 3.5" Internal Hard Drive
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  • $25.00 
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SEAGATE BULK ST1000NM0055 1TB Exos 3.5 512n SATA
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WD WUH721818AL5204 18TB SAS 12Gb/s 7.2K RPM 512M 0F38353 512e/4Kn SE HDD
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  • $409.00 
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ST2000NM0001 Seagate CONSTELLATION 2TB 7.2K RPM 6Gb/s 3.5" SAS HDD Hard Drive
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Dell 0RWR8F - Dell 2.4TB 2.5" SAS 10K 12Gb/s Hard Drive
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Seagate Exos X18 18TB SAS 12Gb/s 3.5" Enterprise HDD - ST18000NM004J
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  • $379.00 
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H8X3X Dell 960GB SAS 2.5" 12G RI SSD G14-G16 Solid State Drive KPM5XRUG960G
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  • $575.00 
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ST6000NM0034 6TB 7.2K 12G 3.5" SAS HDD for Dell T620 T630 T640 T710
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WD RE WD5003ABYZ 500GB 3.5" SATA Internal Hard Drive
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WD9001BKHG-18D22V1 Dell 900GB 10K SAS 6G SFF Hard Drive
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WD Ultrastar DC HC530 14TB SATA 3.5-Inch Enterprise HDD  WUH721414ALE604
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  • $594.45 
0H8DVC Dell ST9300653SS 300GB 15K RPM 6Gb/s 64MB SAS 2.5" HDD Hard Drive W/Caddy
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HGST 0F22408 - 4TB 3.5" SATA 7,200 RPM 6Gb/s Hard Drive
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  • $190.10 
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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