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Seagate BarraCuda 7200.10 ST3250620AS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive
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Seagate BarraCuda 7200.10 ST3250620AS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 10ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3250620AS
  • $106.35
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  • $55.00 
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Dell 5WT78 - Dell 6TB 3.5" Nearline SAS 7.2K 6Gb/s Hard Drive
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DELL
Dell 5WT78 - Dell 6TB 3.5" Nearline SAS 7.2K 6Gb/s Hard Drive
  • NAND Flash Memory Type: SLC
  • Model #: 5WT78
Dell J317F 1 TB Hard Drive - 3.5" Internal - SATA (SATA/300)
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DELL
Dell J317F 1 TB Hard Drive - 3.5" Internal - SATA (SATA/300)
  • NAND Flash Memory Type: Hard Drive
  • Features: Hard Drive
  • Model #: J317F
Dell 400-ATJS 1.8TB 3.5 LFF 12Gbps 10K RPM HS 512e SAS Hybrid Hard Drive
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Dell XX518 146 GB Hard Drive - 3.5" Internal - SAS (3Gb/s SAS)
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HNWHH HUS722T1TALA600 Dell EMC 1TB 7.2K RPM 6Gbps 3.5" SATA HDD Hard Drive
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  • $69.00 
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Maxtor DiamondMax 10 6L080L0 80GB 7200 RPM 2MB Cache IDE Ultra ATA133 / ATA-7 3.5" Hard Drive Bare Drive
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Maxtor DiamondMax 10 6L080L0 80GB 7200 RPM 2MB Cache IDE Ultra ATA133 / ATA-7 3.5" Hard Drive Bare Drive
  • Average Seek Time: 9ms
  • Average Latency: 4.17ms
  • Parts: 1 year limited
  • Labor: 1 year limited
  • Model #: 6L080L0
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HPE 605832-001 500 GB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
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HP
HPE 605832-001 500 GB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
  • NAND Flash Memory Type: SLC
  • Model #: 605832-001
740Y7 MBF2300RC Dell ENTERPRISE 300GB 10K RPM 6Gb/s 2.5" SAS SERVER Hard Drive
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HP 625031-B21 3 TB 3.5' Internal Hard Drive
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HP
HP 625031-B21 3 TB 3.5' Internal Hard Drive
  • Average Latency: 6Gb/s
  • Model #: 625031-B21
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  • $68.19 
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67TMT 067TMT Dell ST2000NM0001 2TB 7.2K RPM 6Gb/s 3.5" SAS SERVER HDD Hard Drive
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  • $64.88 
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HGST Ultrastar 7K6000 HUS726040ALE610 (0F23005) 4TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
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HGST Ultrastar 7K6000 HUS726040ALE610 (0F23005) 4TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
  • Average Seek Time: 7.6ms
  • Average Write Time: 8ms
  • Average Latency: 4.16ms
  • Height (maximum): 26.1mm
  • Model #: 0F23005
WD WD4003FZEX Black WD4003FZEX 4 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
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  • $205.10 
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R749K ST3450857SS Dell 450GB 15K RPM 6Gb/s 3.5" SAS SERVER HDD Hard Drive
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HP 4 TB 3.5" Internal Hard Drive
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HP
HP 4 TB 3.5" Internal Hard Drive
  • Average Latency: 6Gb/s
  • Model #: 793669-B21
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  • $199.90 
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HP 628059-B21 3 TB 3.5' Internal Hard Drive
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HP
HP 628059-B21 3 TB 3.5' Internal Hard Drive
  • Average Seek Time: 8.5ms
  • Average Latency: 3Gb/s
  • Parts: 1 Year
  • Model #: 628059-B21
  • $182.47
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  • $126.19 
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Dell 9Cf26 500Gb 7200Rpm Sata6gbps 3.5Inch 16Mb Buffer Hard Disk Drive
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DELL
Dell 9Cf26 500Gb 7200Rpm Sata6gbps 3.5Inch 16Mb Buffer Hard Disk Drive
  • Average Latency: 6Gb/s
  • Usage: Ideal for Servers
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 9CF26

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