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WESTERN DIGITAL BLUE WD5000AAKX 500GB 7200RPM 6Gb/s 16MB 3.5in SATA HARD DRIVE
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Toshiba MG03ACA MG03ACA100 1 TB 3.5" Internal Hard Drive
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Toshiba MG03ACA MG03ACA100 1 TB 3.5" Internal Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: MG03ACA100
WD WD800JD Caviar SE SE WD800JD 80 GB Hard Drive - 3.5" - SATA (SATA/150)
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Western Digital
WD WD800JD Caviar SE SE WD800JD 80 GB Hard Drive - 3.5" - SATA (SATA/150)
  • NAND Flash Memory Type: SLC
  • Features: Western Digital WD800JD 80 GB Serial ATA 150 Hard Drive General Features: 80 GB storage capacity
  • Height (maximum): 25.4
  • Width (maximum): 101.35
  • Model #: WD800JD
Dell Y1Y2H - Dell 1.2TB 2.5" SAS 10K 12Gb/s Hard Drive
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DELL
Dell Y1Y2H - Dell 1.2TB 2.5" SAS 10K 12Gb/s Hard Drive
  • Average Latency: 6Gb/s
  • Model #: Y1Y2H
ST6000NM0095 Seagate 6TB 7.2K RPM SAS 12Gbps 3.5" 256MB Internal Hard Drive
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Seagate
Refurbished ST6000NM0095 Seagate 6TB 7.2K RPM SAS 12Gbps 3.5" 256MB Internal Hard Drive
  • Average Seek Time: 4.16 ms
  • Part Number: ST6000NM0095
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: ST6000NM0095-REF
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  • $160.00 
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SEAGATE ST1000NM000A 1TB 7200RPM 256MB 512N SATA 3.5
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SEAGATE ST1000NM000A 1TB 7200RPM 256MB 512N SATA 3.5
  • NAND Flash Memory Type: SLC
  • Average Latency: 6Gb/s
  • Model #: ST1000NM000A
ST3000NM0023 Seagate 9ZM278 3TB 7.2K RPM 6Gb/s 3.5" SAS SERVER HDD Hard Drive
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WD Purple WD23PURZ 2TB Hard Drive - 3.5" Internal - SATA (SATA/600) - Conventional Magnetic Recording (CMR) Method - Video Surveillance System Device Supported - 3 Year Warranty
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HGST Ultrastar He8 HUH728080AL4200 (0F23651) 8TB 7200 RPM 128MB Cache SAS 12Gb/s 3.5" Helium Platform Enterprise Hard Drive Bare Drive
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HGST Ultrastar He8 HUH728080AL4200 (0F23651) 8TB 7200 RPM 128MB Cache SAS 12Gb/s 3.5" Helium Platform Enterprise Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 9ms
  • Average Latency: 4.16ms
  • Height (maximum): 26.1mm
  • Model #: 0F23651
IBM 00Y2432 00Y2507 00AR010 1.2TB 10000RPM 6Gbps 2.5" SAS SERVER HDD Hard Drive
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TOSHIBA N300 Pro HDWG51GXZSTB 16TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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TOSHIBA N300 Pro HDWG51GXZSTB 16TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: HDWG51GXZSTB
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Seagate Exos 7E2000 1TB 7200-RPM Dual-Port 512e SAS-12Gb/s 128MB-Cache 2.5-Inch Enterprise Capacity Data Center Hard Disk Drive (ST1000NX0373)
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Seagate
Seagate Exos 7E2000 1TB 7200-RPM Dual-Port 512e SAS-12Gb/s 128MB-Cache 2.5-Inch Enterprise Capacity Data Center Hard Disk Drive (ST1000NX0373)
  • Average Latency: 4.16ms
  • Height (maximum): 15mm
  • Width (maximum): 70.10mm
  • Length (maximum): 100.45mm
  • Model #: ST1000NX0373
Dell R755K 2 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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DELL
Dell R755K 2 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
  • NAND Flash Memory Type: Hard Drive
  • Features: Hard Drive
  • Usage: Ideal for Servers
  • Parts: 30 DAYS WARRANTY
  • Model #: R755K
Dell 4 TB 3.5" Internal Hard Drive
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DELL
Dell 4 TB 3.5" Internal Hard Drive
  • Features: Hard Drive
  • Usage: Ideal for Servers
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 529FG
Dell RMCP3 0RMCP3 ST1200MM0007 1.2TB 10K 6G  2.5" SAS Hard Drive
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  • $54.95 
Dell 1.2TB 2.5" SAS 10,000 RPM 12Gb/s Hard Drive
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9ZM170-036  Dell 4TB 7.2K SATA 6G LFF Hard Drive
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  • $175.00 
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WD10EADS Western Digital 1TB 5.4K RPM 3Gb/s 3.5" SATA HDD Hard Drive (WD10EADS)
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  • $69.88 
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Hitachi Ultrastar 7K3000 HUA723020ALA641 2TB 7200RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive -OEM
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  • $85.10 
  • Free Shipping
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WD WD4001FYYG RE WD4001FYYG 4 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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  • $94.10 
  • Free Shipping
Dell 8TB 7.2K 12Gbps NL SAS 3.5 HDD (43V7V)
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  • $275.00 
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Dell 8WP8W 600GB 10000 RPM SAS 6Gb/s 2.5" Internal Hard Drive Bare Drive
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DELL
Dell 8WP8W 600GB 10000 RPM SAS 6Gb/s 2.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 8WP8W
C3YJM ST500NM0011 Dell CONSTELLATION 500GB 7200RPM 6Gb/s 3.5" SATA Hard Drive
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Dell R95FV 600GB 10000RPM 12Gb/s 2.5" SAS Hard Drive ST600MM0088
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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:

Keith V.
4/9/2026 4:20:16 PM
High Capacity Plug and Play Drive

“ SATA so it plugs right into my old media server ”

Seagate BarraCuda ST24000DM001 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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
1/17/2026 7:23:35 PM
Works great if not DOA

“ I initially purchased two drives to replace two old WD 6TB drives (one died before Xmas) in a WD NAS. ”

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX