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Seagate Cheetah 15K.7 ST3600957SS 600GB 15000 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Enterprise Hard Drive with Secure Encryption Bare Drive
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  • $289.00
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  • $80.00 
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M40TH ST8000NM0185 Dell 8TB 7.2K RPM 12Gb/s 3.5" SAS Hard Drive 0M40TH
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  • $475.00 
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Hitachi (HTS723232A7A364) 320GB 7200RPM SATA 3.0Gb/s 2.5" Notebook Hard Drive
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  • $54.50 
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HGST 3.5" 4TB SAS 12Gb/s 7.2K RPM 128M 0F22795 512e ISE Internal Enterprise Hard Drive - HUS726040AL5210
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HGST 3.5" 4TB SAS 12Gb/s 7.2K RPM 128M 0F22795 512e ISE Internal Enterprise Hard Drive - HUS726040AL5210
  • NAND Flash Memory Type: SLC
  • Average Latency: 12Gb/s
  • Model #: Newegg_Delete
  • $224.90
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  • $135.00 
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9RZ264-039 IBM ST9500620SS 500GB 7.2K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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  • $138.95 
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DELL H8DVC-KIT DELL 300GB 15K SAS 2.5 6Gbps 64MB HDD W/G176J TRAY
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IBM 44W2245 600GB 15000 RPM SAS 6Gb/s 3.5" Internal Hard Drive
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HPE 605475-001 2 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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HPE 605475-001 2 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
  • Average Latency: 6Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 605475-001
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  • $71.19 
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HP 1TB 7.2K SATA 6GB/s 2.5" SFF G8 GEN8 655710-B21 656108-001 614829-003 Hard Drive
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  • $88.95 
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HITACHI DESKSTAR 320GB 7200RPM 16MB CACHE 3.5 INCH SATA HARD DRIVE HDT72532VLA380
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  • $58.19 
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EG0600FCVBK 581286-B21 693569-003 HPE 600GB 10K 6Gb/s 2.5" SFF SC SAS Hard Drive
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  • $69.88 
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EH0300FCBVC652611-B21 652625-002 HP 300GB 15K RPM 6Gb/s 2.5" SFF SAS Hard Drive
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  • $73.88 
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HGST Travelstar Z7K500 HTS725050A7E630 500GB 2.5" SATA III Laptop Hard Drive
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627985-001 HP 320GB 5.4K RPM 3Gb/s 2.5" SATA Laptop HDD Hard Drive
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HP
627985-001 HP 320GB 5.4K RPM 3Gb/s 2.5" SATA Laptop HDD Hard Drive
  • Model #: 627985-001-HTS543232A7A384-hp-new-ATP
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  • $54.88 
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00Y2431 00Y2505 00Y5721 IBM 900GB 10K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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MBA3147RC - Fujitsu 146GB 15000 RPM 16MB Buffer 3.5 Inch Serial Attached SCSI Hard Drive.
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  • $42.00 
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Dell 1.2TB 2.5" SAS 10,000 RPM 12Gb/s Hard Drive
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DELL W347K 600GB ST3600057SS 3.5" 15K SAS Spare T710 R710 R610 MD1200 R510 R410 R720 R720XD R620 R520 R420
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42D0637 42D0638 42D0641 IBM 300GB 10K RPM 6Gb/s 2.5" SAS Hard Drive W/ZERO HOURS
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  • $58.88 
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HTS541010A9E680 HGST 0J26213 1TB 5400RPM 6Gbps 2.5" SATA HDD Hard Drive
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  • $225.00 
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HPE 605832-002 MM1000FBFVR 1 TB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
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  • $163.19 
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HP MSA 8TB 12G SAS 7.2K 3.5IN 512E H
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HP
HP MSA 8TB 12G SAS 7.2K 3.5IN 512E H
  • NAND Flash Memory Type: SLC
  • Average Latency: 12Gb/s
  • Model #: M0S90A
DELL ENTERPRISE ACCESSORIES 400-AJOE 6TB SAS 12GBPS 3.5IN 7.2K NL HP
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DELL 0R95FV 600GB SAS HD 2.5" 12Gbps 10K RPM MODEL: ST600MM0088 R95FV NTPP3
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8YWH3 Dell 2.4TB SAS 2.5" SFF 10K RPM 12Gb/s SED FIPS Server HDD Hard Drive 08YWH3
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  • $555.00 
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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