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WD Red Pro 16TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive - WD161KFGX
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WD Red Pro 16TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive - WD161KFGX
  • Brand: WD
  • Series: Red Pro
  • Capacity: 16TB
  • RPM: 7200 RPM
  • Model #: WD161KFGX
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Seagate BarraCuda 7200.9 ST3500641AS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3500641AS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8.2ms
  • Average Write Time: 9ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3500641AS
ST500LM034 Seagate 2GH17A 500GB 7.2K RPM 6Gb/s 2.5" SATA Laptop HDD Hard Drive
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HGST Ultrastar He8 HUH728080ALE600 (0F25739) 8TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Helium Platform Enterprise Hard Disk Drives Bare Drive
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HGST Ultrastar He8 HUH728080ALE600 (0F25739) 8TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Helium Platform Enterprise Hard Disk Drives Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 9ms
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Model #: 0F25739
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HGST Ultrastar A7K2000 HUA722010CLA330 (0A39289) 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
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HGST Ultrastar A7K2000 HUA722010CLA330 (0A39289) 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Height (maximum): 25.4mm
  • Parts: 2 yrs
  • Labor: 2 yrs
  • Model #: 0A39289
HGST Ultrastar 7K6000 HUS726020ALE610 (0F23009) 2TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
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HGST Ultrastar 7K6000 HUS726020ALE610 (0F23009) 2TB 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
  • NAND Flash Memory Type: Hard Drive
  • Model #: 0F23009
Axiom 7XB7A00050-AX 2 TB 6GBs SATA 7.2K RPM LFF Hot-Swap Hard Drive for Lenovo
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  • $887.27
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  • $420.99 
  • Save: 52%
  • Free Shipping
Western Digital Blue WD5000AAKX 500GB 3.5" SATA 6Gbps 16MB 7.2K Hard Drive
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Western Digital
Western Digital Blue WD5000AAKX 500GB 3.5" SATA 6Gbps 16MB 7.2K Hard Drive
  • Brand: Western Digital
  • Part Number: WD5000AAKX
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: WD5000AAKX-New
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  • $60.00 
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Axiom 1.80 TB Hard Drive - SAS (12Gb/s SAS) - 3.5" Drive - Internal
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  • $690.99 
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833928-B21 HPE 4TB 7.2K 12Gbps 3.5" SAS Hard Drive 834134-001 846523-004
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833928-B21 HPE 4TB 7.2K 12Gbps 3.5" SAS Hard Drive 834134-001 846523-004
  • Average Seek Time: 8.5ms
  • Part Number: 833928-B21
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: 833928-B21-NB
Buffalo 2 TB Hard Drive
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Buffalo 2 TB Hard Drive
  • Model #: OP-HD2.0BNB
846996-B21 HP 4TB 7.2K 12Gbps 3.5" SAS Hard Drive 847035-001 765252-001
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846996-B21 HP 4TB 7.2K 12Gbps 3.5" SAS Hard Drive 847035-001 765252-001
  • Average Seek Time: 7.4ms
  • Part Number: 846996-B21
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: 846996-B21-NB
BUFFALO 4TB Replcement  HD TeraStation Model OP-HD4.0BST-3Y
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846785-B21 HPE 6TB 7.2K 6Gbps 3.5" Midline SATA Hard Drive 847033-001 765251-002
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846785-B21 HPE 6TB 7.2K 6Gbps 3.5" Midline SATA Hard Drive 847033-001 765251-002
  • Average Seek Time: 8.5ms
  • Part Number: 846785-B21
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: 846785-B21-NB
HPE P13701-B21 3.2TB NVMe x4 Mixed Use SCN 2.5" SSD P10592-002 P45633-001
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HPE P13701-B21 3.2TB NVMe x4 Mixed Use SCN 2.5" SSD P10592-002 P45633-001
  • Part Number: P13701-B21
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: P13701-B21-FS
Toshiba MG03ACA 2 TB 3.5" Hard Drive - Internal MG03ACA200
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  • $216.99 

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:

the Muttonmastwer
5/11/2026 11:18:09 AM
Hasn't broken yet

“ I have it attached via USB on my desktop and it has all my work on it, safe from Windoze crash damage or erasure on OS re-installs. ”

WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 16MB Cache 3.5 Inch - WD5000AAKX