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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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Dell EQUALLOGIC V9M9K ST4000NM0025 4TB 7.2KRPM 12Gbps Nearline 3.5"SAS HardDrive
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  • $294.00 
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Dell 400-ASGQ - Dell 300GB 2.5" SAS 15K 12Gb/s Hard Drive
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DELL
Dell 400-ASGQ - Dell 300GB 2.5" SAS 15K 12Gb/s Hard Drive
  • NAND Flash Memory Type: SLC
  • Average Latency: 12Gb/s
  • Model #: 400-ASGQ
Seagate SkyHawk AI ST10000VE0008 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate SkyHawk AI ST10000VE0008 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST10000VE0008
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SEAGATE ST8000NM001A 8TB 7200 RPM 256MB SAS 3.5
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SEAGATE ST8000NM001A 8TB 7200 RPM 256MB SAS 3.5
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST8000NM001A
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Seagate Pipeline HD ST2000VM002 2TB 5900 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate Pipeline HD ST2000VM002 2TB 5900 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 12ms
  • Average Write Time: 13ms
  • Parts: 2 yrs
  • Labor: 2 yrs
  • Model #: ST2000VM002
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  • $77.00 
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Seagate Enterprise Capacity 3.5'' HDD 8TB 7200 RPM 4Kn SAS 12Gb/s 256MB Cache Internal Hard Drive ST8000NM0065
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Seagate Enterprise Capacity 3.5'' HDD 8TB 7200 RPM 4Kn SAS 12Gb/s 256MB Cache Internal Hard Drive ST8000NM0065
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST8000NM0065
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  • $344.45 
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Hitachi (0A38876) 1TB 32MB Cache 7200RPM SATA2 (3.0Gbps) 3.5" (Heavy Duty) Hard Drive NAS, RAID, CCTV DVR, PC/Mac - OEM w/ 1 Year Warranty
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  • $50.00 
  • $10.99 Shipping
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ST10000NM0086 Seagate ENTERPRISE 2AA101-038 10TB 7.2K RPM 6Gb/s 3.5" SATA HDD Hard Drive
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  • $389.95 
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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
Seagate ST3500414CS 500GB 5900 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate ST3500414CS 500GB 5900 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: <14.0ms (read) <15.0ms (write)
  • Average Latency: 5.1ms
  • NAND Flash Memory Type: Desktop
  • Parts: 2 Years Warranty from Reseller
  • Model #: ST3500414CS
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  • $39.10 
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Seagate BarraCuda 7200.9 ST3402111A 40GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3402111A 40GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 11ms
  • Average Write Time: 12ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3402111A
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  • $100.00 
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7FJW4 Dell ST300MP0005 ENT300GB 15K RPM 12Gb/s 2.5" SAS SERVER HDD Hard Drive
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XY986 Dell - 2TB 7.2K RPM 12Gb/s SAS 2.5"
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DELL
XY986 Dell - 2TB 7.2K RPM 12Gb/s SAS 2.5"
  • Model #: d83-109409000123738
HGST HUC101212CSS600 0B28482 1.2TB 10K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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Hitachi - HGST ULTRASTAR 3.5 4TB 7200RPM SATA III 6GBPS 64MB CACHE ENTERPRISE HARD DRIVE W
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Seagate Exos 7E10 8TB SATA Video Surveillance Hard Drive ST8000NM019B
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Seagate
Seagate Exos 7E10 8TB SATA Video Surveillance Hard Drive ST8000NM019B
  • NAND Flash Memory Type: SLC
  • Parts: 5 Year
  • Model #: ST8000NM019B
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Seagate Exos X18 ST18000NM005J 18TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive, 512E/4KN SED
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Seagate
Seagate Exos X18 ST18000NM005J 18TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive, 512E/4KN SED
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST18000NM005J
Dell G16 12TB 00JHTD 7.2K RPM SAS 12Gb/s 512e 3.5in PowerEdge Refurbished Hard Drive
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DELL
Refurbished Dell G16 12TB 00JHTD 7.2K RPM SAS 12Gb/s 512e 3.5in PowerEdge Refurbished Hard Drive
  • Brand: Dell
  • Series: Generation 14
  • Capacity: 12TB
  • RPM: 7200 RPM
  • Model #: 00JHTD-DELLG14
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  • $279.00 
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Seagate Exos X18 18TB SAS 12Gb/s 3.5" Enterprise HDD - ST18000NM004J
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  • $379.00 
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HP 652611-B21 300GB 15000 RPM SAS 6Gb/s 2.5" SFF SC Enterprise Hard Drive
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HP
HP 652611-B21 300GB 15000 RPM SAS 6Gb/s 2.5" SFF SC Enterprise Hard Drive
  • Height (maximum): 15.6 mm
  • Width (maximum): 75.7 mm
  • Length (maximum): 118.7 mm
  • Parts: 3 Year
  • Model #: 652611-B21
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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