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Seagate BarraCuda XT ST32000641AS 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda XT ST32000641AS 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST32000641AS
Seagate BarraCuda 7200.11 ST31000340AS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.11 ST31000340AS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST31000340AS
WD Ultrastar DC HC330 0B42258 10TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive
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Western Digital
WD Ultrastar DC HC330 0B42258 10TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Model #: 0B42258
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HITACHI Hts727550A9E364 Travelstar 7K750 500Gb 7200Rpm Sataii 16Mb Buffer 2.5Inch Internal Hard Drive
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  • $38.95 
Lenovo 2TB 3.5" SATA 7200rpm Internal Hard Drive - Hot Swappable 7XB7A00050
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Dell WD2003FYYS-18W0B0
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DELL
Dell WD2003FYYS-18W0B0
  • Model #: IE1F2-00-B007N-1
872491-B21 4TB 7200RPM SATA 3.5Inch HP Hard Drive
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  • $100.00 
  • Free Shipping
Toshiba P300 2TB Desktop PC Internal Hard Drive 7200 RPM SATA 6Gb/s 64 MB Cache 3.5 inch - HDWD120UZSVA (BULK)
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Toshiba P300 2TB Desktop PC Internal Hard Drive 7200 RPM SATA 6Gb/s 64 MB Cache 3.5 inch - HDWD120UZSVA (BULK)
  • Average Latency: 4.17ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: HDWD120UZSVA
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Seagate Exos X14 ST10000NM0478 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive, 512e Bare Drive
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Seagate Exos X14 ST10000NM0478 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive, 512e Bare Drive
  • Average Latency: 4.16ms
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST10000NM0478
Dell 300 GB 3.5" Internal Hard Drive F617N
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759548-001 759212-B21 HP 600GB 15K 12G SAS 2.5" Hard Drive
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  • $107.00 
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EH000300JWHPL HPE 300GB 15K 12G SFF SAS SC Hard Drive
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WL 320GB 8MB Cache 7200RPM SATA2 3.5" Internal Desktop Hard Drive (For DELL, HP, Compaq, eMachine, IBM, Gateway) -1 Year Warranty
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WL 320GB 8MB Cache 7200RPM SATA2 3.5" Internal Desktop Hard Drive (For DELL, HP, Compaq, eMachine, IBM, Gateway) -1 Year Warranty
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: WL320SATA872
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  • $28.99 
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WD1600AAJS Western Digital U717D 160GB 7200RPM 3Gbps 3.5" SATA Hard Drive
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  • $48.95 
  • Free Shipping
HUC101212CSS600-DELL DELL 1.2TB 10K 6GBPS SAS 2.5 Hard Drive
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X160K ST9146803SS Dell 146GB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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DELL
X160K ST9146803SS Dell 146GB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive
  • Model #: X160K-ST9146803SS-0X160K-dell-new-ATP123
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  • $32.00 
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T871K ST9300603SS Dell 300GB 10K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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0-HRS YJ2KH ST300MM0008  Dell 300GB 10KRPM 12Gb/s2.5"SAS SERVERHDD Hard Drive V8
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  • $55.88 
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WFGTH Dell 960GB SAS 2.5" 12Gbs MLC MU SSD Gen14 Solid State Drive KPM5XVUG960G
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EG0900FBLSK HPE 900GB 10K 6G SFF SAS SC Hard Drive
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Dell EQUALLOGIC V9M9K ST4000NM0025 4TB 7.2KRPM 12Gbps Nearline 3.5"SAS HardDrive
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  • $294.00 
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HGST HUS724040ALS640 Ultrastar 7K4000 HUS724040ALS640 4 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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Refurbished HGST HUS724040ALS640 Ultrastar 7K4000 HUS724040ALS640 4 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
  • Part Number: HUS724040ALS640
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: HUS724040ALS640

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