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Dell 745GC 0745GC 300GB 10K 6G 2.5in SAS HDD ST93000605SS W/ Tray
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IBM 49Y1880 - 1TB 3.5" Near Line SAS 7.2K 6Gb/s HS Hard Drive
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IBM 49Y1880 - 1TB 3.5" Near Line SAS 7.2K 6Gb/s HS Hard Drive
  • NAND Flash Memory Type: SLC
  • Average Latency: 6Gb/s
  • Model #: 49Y1880
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  • $135.19 
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HP 689287-001 300Gb 10000Rpm 6G Sas 2.5Inch Dualport Enterprise Smartdrive Carrier Hotplug Hard Disk Drive With
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  • $68.19 
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Dell EQL 8WR71 08WR71 300GB 15K 6G 2.5" SAS HDD ST9300653SS W/ Tray
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DELL
Dell EQL 8WR71 08WR71 300GB 15K 6G 2.5" SAS HDD ST9300653SS W/ Tray
  • Parts: 30 days warranty
  • Labor: 30 days warranty
  • Model #: CWH-264493434263
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HPE 597609-003 600 GB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
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HP
HPE 597609-003 600 GB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
  • NAND Flash Memory Type: SLC
  • Model #: 597609-003
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  • $131.19 
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Dell XY986 2TB 2.5" SAS 7200rpm Internal Hard Drive
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01NN116 01NN142 01NN144 IBM 1.8TB 10K 12Gb/s 2.5" SAS Hard Drive For V5000 GEN2
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  • $269.99 
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HP 430165-003 146Gb 10000Rpm Sas 3Gbits 2.5Inch Dual Port Sff Hard Disk Drive With Tray
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HP
HP 430165-003 146Gb 10000Rpm Sas 3Gbits 2.5Inch Dual Port Sff Hard Disk Drive With Tray
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 430165-003
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  • $130.19 
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Seagate Cheetah ST373307LW 74GB 10000 RPM 8MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
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Seagate
Used - Like New Seagate Cheetah ST373307LW 74GB 10000 RPM 8MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
  • Average Seek Time: 4.7ms
  • Average Write Time: 5.2ms
  • Average Latency: 2.99ms
  • Parts: 5 years limited
  • Model #: ST373307LW
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  • $170.10 
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HP 649401-003 2Tb 7200Rpm 3.5Inch Midline Sata 3Gb By S Hard Disk Drive With Tray
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  • $149.19 
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Fujitsu Mhy2160bh 160Gb 5400Rpm 8Mb Buffer 2.5Inch Sata Notebook Hard Drive
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  • $48.20
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  • $48.19 
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DELL 2.40TB 2.5" SAS 10K rpm Internal Hard Drive Hot Swap/Pluggable 400AUQX
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DELL
DELL 2.40TB 2.5" SAS 10K rpm Internal Hard Drive Hot Swap/Pluggable 400AUQX
  • NAND Flash Memory Type: Hard Drive
  • Model #: 400-AUQX
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  • $600.00 
HP 289042-001 72.8GB 10000 RPM SCSI Ultra320 3.5" Internal Hard Drive
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  • $29.80 
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0B33078 Dell ENT HUC101812CSS204 1.2TB 10KRPM 12Gbps 2.5"SAS SERVERHDD HardDrive
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HP 646894-001 1Tb 7200Rpm Sata 3.5Inch Hot Swap Hard Disk Drive
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HP
HP 646894-001 1Tb 7200Rpm Sata 3.5Inch Hot Swap Hard Disk Drive
  • NAND Flash Memory Type: Hard Drive
  • Model #: 646894-001
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  • $71.19 
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Seagate ST1200MM0088 ST1200MM0088 1.20 TB Hard Drive - 2.5" Internal - SAS (12Gb/s SAS)
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Seagate
Refurbished Seagate ST1200MM0088 ST1200MM0088 1.20 TB Hard Drive - 2.5" Internal - SAS (12Gb/s SAS)
  • NAND Flash Memory Type: SLC
  • Usage: Ideal for Servers
  • Model #: ST1200MM0088
HP 404709-001 72.8GB 10000 RPM SCSI Ultra320 HOT-PLUG Internal Hard Drive
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  • $51.95 
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ST9900805SS Seagate 9TH066-046 900GB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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  • $24.95 
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Dell FR6W6 - Dell 1.2TB 2.5" SAS 10K 12Gb/s Hard Drive
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DELL
Dell FR6W6 - Dell 1.2TB 2.5" SAS 10K 12Gb/s Hard Drive
  • NAND Flash Memory Type: SLC
  • Average Latency: 6Gb/s
  • Usage: For Enterprise Storage
  • Model #: FR6W6
Dell 55H49 - Dell 3TB 3.5" SAS 7.2K 6Gb/s Hard Drive
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DELL
Dell 55H49 - Dell 3TB 3.5" SAS 7.2K 6Gb/s Hard Drive
  • NAND Flash Memory Type: SLC
  • Model #: 55H49
Dell TRCN6 - Dell 600GB 2.5" SAS 15K 12Gb/s Hard Drive
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DELL
Dell TRCN6 - Dell 600GB 2.5" SAS 15K 12Gb/s Hard Drive
  • Average Latency: 6Gb/s
  • Model #: TRCN6
Dell F0V7R - Dell 600GB 2.5" SAS 10K 12Gb/s Hard Drive
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DELL
Dell F0V7R - Dell 600GB 2.5" SAS 10K 12Gb/s Hard Drive
  • Average Latency: 6Gb/s
  • Model #: F0V7R
Dell 6DWVP - Dell 600GB 2.5" SAS 10K 12Gb/s Hard Drive
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DELL
Dell 6DWVP - Dell 600GB 2.5" SAS 10K 12Gb/s Hard Drive
  • Average Latency: 12Gb/s
  • Model #: 6DWVP
Fujitsu MAX3147NC 147GB 15000 RPM 8MB Cache SCSI Ultra320 80pin 3.5" Hard Drive
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Fujitsu MAX3147NC 147GB 15000 RPM 8MB Cache SCSI Ultra320 80pin 3.5" Hard Drive
  • Average Seek Time: 3.3ms
  • Average Write Time: 3.8ms
  • Average Latency: 2ms
  • Parts: 1 year limited
  • Model #: MAX3147NC
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  • $235.19 
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Transcend 128GB M.2 2280 PCIe Gen3X4 3D TLC Internal SSD
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ST3300657SS Seagate 300GB SAS 3.5" LFF 6G 15K Hard Drive 45E7953
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  • $51.96 
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LOT OF 10-Dell 9W5WV ST91000640SS 1TB 7.2KRPM 6Gb/s 2.5"SAS SERVER HDD HardDrive
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  • $499.00 
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Dell 4J5P1 - Dell 600GB 2.5" SAS 15K 6Gb/s Hard Drive
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DELL
Dell 4J5P1 - Dell 600GB 2.5" SAS 15K 6Gb/s Hard Drive
  • NAND Flash Memory Type: SLC
  • Average Latency: 6Gb/s
  • Usage: For Enterprise Storage
  • Model #: 4J5P1

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