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Dell 9KW4J - 1TB 2.5" SATA 7.2K 6Gb/s HS Hard Drive
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Dell 9KW4J - 1TB 2.5" SATA 7.2K 6Gb/s HS Hard Drive
  • Average Latency: 6Gb/s
  • Usage: Ideal for Servers
  • Model #: 9KW4J
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WD Ultrastar DC HC530 14TB 7.2K SATA 6Gbps 512MB 3.5" WUH721414ALE6L4 Hard Drive
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Western Digital
Refurbished WD Ultrastar DC HC530 14TB 7.2K SATA 6Gbps 512MB 3.5" WUH721414ALE6L4 Hard Drive
  • Average Seek Time: 4.6ms
  • Part Number: WUH721414ALE6L4
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: WUH721414ALE6L4-REF
Dell 6 TB 3.5" Internal Hard Drive
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DELL
Dell 6 TB 3.5" Internal Hard Drive
  • Average Latency: 3Gb/s
  • Usage: For Enterprise Storage
  • Model #: 400-ALCR
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Western Digital Blue WD2500AAKX 250GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Western Digital
Refurbished Western Digital Blue WD2500AAKX 250GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Brand: Western Digital
  • Series: Blue
  • Capacity: 250GB
  • RPM: 7200 RPM
  • Model #: WD2500AAKX
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  • $19.99 
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Seagate ST10000NM002G Exos X16 ST10000NM002G 10 TB Hard Drive - Internal - SAS (12Gb/s SAS)
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  • $250.00 
  • Free Shipping
  • $245.00 - $250.00
846523-004 HPE 4TB 7.2K 12G MIDLINE LFF SAS SC Hard Drive
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WD6400AAKS Western Digital C118D 640GB 7200RPM 3Gbps 3.5" SATA HDD Hard Drive
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HPE 2.40TB 2.5" SAS 10000rpm Internal Hard Drive R0Q57A
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HPE 2.40TB 2.5" SAS 10000rpm Internal Hard Drive R0Q57A
  • NAND Flash Memory Type: Others
  • Model #: R0Q57A
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WD Purple NV 6TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD6NPURX
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Used - Like New WD Purple NV 6TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD6NPURX
  • Height (maximum): 26.1mm
  • Width (maximum): 101.6mm
  • Length (maximum): 147mm
  • Model #: WD6NPURX
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ST4000NM0095 Seagate EXOS 4TB SAS 3.5" 7.2K 12Gb/s 4Kn 128MB Hot-Plug Hard Drive
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9SM260-150 Dell 3TB 7.2K SAS 6G LFF Hard Drive
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Dell 835R9 - 2TB 3.5" SATA 7.2K 6Gb/s HS Hard Drive
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DELL
Dell 835R9 - 2TB 3.5" SATA 7.2K 6Gb/s HS Hard Drive
  • NAND Flash Memory Type: SLC
  • Average Latency: 6Gb/s
  • Features: Hard Drive
  • Usage: Ideal for Servers
  • Model #: 835R9
400-AHIW Dell - 8TB 7.2K 3.5" SAS HD
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DELL
400-AHIW Dell - 8TB 7.2K 3.5" SAS HD
  • Model #: 8WWE8-00-B01BT-1
WD Ultrastar DC HC530 14TB SATA 3.5-Inch Enterprise HDD  WUH721414ALE604
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  • $594.45 
  • Free Shipping
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Seagate Desktop HDD ST4000DM000 4TB 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate
Refurbished Seagate Desktop HDD ST4000DM000 4TB 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Brand: Seagate
  • Series: Desktop HDD
  • Capacity: 4TB
  • RPM: N/A
  • Model #: ST4000DM000
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  • $117.99 
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Dell G5DM2 - Dell 2TB 2.5" Nearline SAS 7.2K 12Gb/s Hard Drive
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DELL
Dell G5DM2 - Dell 2TB 2.5" Nearline SAS 7.2K 12Gb/s Hard Drive
  • Average Latency: 6Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: G5DM2
36RH9 036RH9 Dell ENTERPRISE 1.2TB 10K RPM 6Gbps 2.5" SAS SERVER HDD Hard Drive
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  • $57.00 
  • Free Shipping
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Seagate Exos X20 ST20000NM007D 20TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive
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Seagate
Used - Very Good Seagate Exos X20 ST20000NM007D 20TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive
  • Brand: Seagate
  • Series: Exos X20
  • Capacity: 20TB
  • RPM: 7200 RPM
  • Model #: ST20000NM007D
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  • $608.49 
  • $11.20 Shipping
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Seagate IronWolf Pro 12TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive ST12000NE0007
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Seagate IronWolf Pro 12TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive ST12000NE0007
  • Average Latency: 4.16ms
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST12000NE0007
Dell 529FG 4TB 7200 RPM SAS 6Gb/s 3.5" Internal Hard Drive
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Seagate Exos X18 ST18000NM000J 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate Exos X18 ST18000NM000J 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST18000NM000J

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