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Dell 2RR9T // ST900MM0006 900GB SAS 10K 2.5" Hard Drive with Tray
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  • $50.00 
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hpe 872477-b21 872736-001 600gb 12g sas 10k 2.5 sff ent hdd sc ds new factory sealed
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  • $250.00 
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779176-B21 780436-001 765289-004 HPE 1.6TB 12Gbps 2.5" SAS Solid State Drive SSD
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  • $718.88 
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4TB 6G 7.2K 64MB Cache 3.5" Hitachi Hard DriveHUS724040ALA640 0F19459
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  • $100.10 
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Dell 4X1DR // WD9001BKHG-18D22V1 900Gb 10K SAS 6Gbps 2.5" HDD
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  • $46.00 
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ST300MM0006-DELL 300GB 10K 6G SFF SAS HDD
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DELL 300GB 15K SAS 2.5" HDD  H8DVC - ST9300653SS - 0YVFK8 - 0C8TC5 - C8TC5 SED
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  • $54.00 
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NetApp X477A-R6 4TB 7.2K SAS 3.5'' Hard Drive DS4243 DS4246 FAS2240 0B26922
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  • $80.00 
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OEM DELL EQUALLOGIC PS5000E PS6000E 2TB 7.2K SATA HDD ST2000NM0011 2P4N9 W/TRAY
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  • $98.95 
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Dell 300GB 6G SAS 15K 2.5 HDD H8DVC NWH7V R610 R710 R620 R720 R630 R730
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  • $89.95 
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202V7 Dell WD4001FYYG Original 4TB 7.2K RPM 6Gb/s 3.5" SAS SERVER HDD Hard Drive
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"Dell 400-AJQD / 6WCT7 1.2TB 2.5"" 10K RPM SAS Hard Drive Kit NRX7Y"
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  • $195.00 
Western Digital WD10EZEX-20PK 1TB 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive  (20-pack)
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  • $1,300.00 - $1,350.00
ST3300657SS F617N Dell CHEETAH 300GB 15K RPM 6Gb/s 3.5" SAS Hard Drive
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DELL
ST3300657SS F617N Dell CHEETAH 300GB 15K RPM 6Gb/s 3.5" SAS Hard Drive
  • Model #: ST3300657SS-0F617N-F617N-dell-new-drive
4Hgtj 600Gb 15K 2.5 12Gbs Sas Hdd
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DELL
4Hgtj 600Gb 15K 2.5 12Gbs Sas Hdd
  • Model #: a54b4070-6c65-4-N2

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