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HPE 876936-002 - HPE 1.2TB 2.5" SAS 10K 12Gb/s Solid State Drive
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  • $389.99 
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HP High-Performance Secure Hard Disk (B5L29A)
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HP
HP High-Performance Secure Hard Disk (B5L29A)
  • Part Number: B5L29A
  • Features: HP High-Performance Secure Hard Disk
  • Usage: HP Color LaserJet Enterprise M553n B5L24A, HP Color LaserJet Enterprise M553dn B5L25A, HP Color LaserJet Enterprise M553x B5L26A, HP Color LaserJet Managed M553dnm B5L38A, HP Color LaserJet Managed M553xm B5L39A, HP LaserJet Enterprise M604n E6B67A, HP LaserJet Enterprise M604dn E6B68A, HP LaserJet Enterprise M605n E6B69A, HP LaserJet Enterprise M605dn E6B70A,
  • Height (maximum): 1.4"
  • Model #: B5L29A
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HPE ISS 861686-B21 1TB SATA 7.2K LFF LP DS HD
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HP
HPE ISS 861686-B21 1TB SATA 7.2K LFF LP DS HD
  • NAND Flash Memory Type: Hard Drive
  • Model #: 861686-B21
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Western Digital AV-GP WD20EURS 2TB 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Avolusion PRO-5X Series 2TB USB 3.0 External Gaming Hard Drive for PS5 Game Console (White) - 2 Year Warranty
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  • $98.99 
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Seagate Constellation ES ST500NM0001 500GB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Internal Enterprise Hard Drive Bare Drive
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Seagate Constellation ES ST500NM0001 500GB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Internal Enterprise Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Enterprise
  • Parts: 2 YRS
  • Labor: 2 YRS
  • Model #: ST500NM0001
Avolusion 1TB USB 3.0 External PS4 (Slim & Pro) Hard Drive (PS4 Pre-Formatted)
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  • $59.99 
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Western Digital Black WD2002FAEX 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Western Digital Black WD2002FAEX 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Brand: Western Digital
  • Series: Black
  • Model: WD2002FAEX
  • Capacity: 2TB
  • Model #: WD2002FAEX
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EPOS | SENNHEISER IMPACT D 10 USB ML - US II Headset
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EPOS | SENNHEISER IMPACT D 10 USB ML - US II Headset
  • NAND Flash Memory Type: Headset
  • Model #: 840064408011
  • $234.99
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  • $199.99 
  • Save: 14%
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WD Purple 3TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD30PURZ
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WD Purple 3TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD30PURZ
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD30PURZ
HPE EH000900JWHPP - HPE 900GB 2.5" SAS 15K 12Gb/s Solid State Drive
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HP
HPE EH000900JWHPP - HPE 900GB 2.5" SAS 15K 12Gb/s Solid State Drive
  • NAND Flash Memory Type: SLC
  • Model #: EH000900JWHPP
  • $668.80 - $672.16
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Western Digital WD5003AZEX Caviar Black 3.5" 500GB SATA Hard Drive
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Apricorn Aegis Padlock A25-3PL256-S512F 512 GB External Solid State Drive
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  • $480.99
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  • $319.99 
  • Save: 33%
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Seagate BarraCuda ST3250312AS 250GB 7200 RPM 8MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda ST3250312AS 250GB 7200 RPM 8MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • NAND Flash Memory Type: Desktop
  • Parts: 2 years limited
  • Labor: 2 years limited
  • Model #: ST3250312AS
Seagate BarraCuda 7200.10 ST3320620AS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording Technology) Bare Drive
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Seagate Cheetah NS.2 ST3450802SS 450GB 10000 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate
Seagate Cheetah NS.2 ST3450802SS 450GB 10000 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 2.98ms
  • NAND Flash Memory Type: Enterprise
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST3450802SS
Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive (ST18000NM003D)
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Seagate
Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive (ST18000NM003D)
  • Average Latency: 4.16ms
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST18000NM003D.
Seagate IronWolf Pro ST2000NT001 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate IronWolf Pro ST2000NT001 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST2000NT001
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Seagate ST300MM0006 300GB 10000 RPM SAS 6Gb/s 2.5" Savvio 10K.6 Hard Drive
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Seagate BarraCuda ES.2 ST31000640SS 1TB 7200 RPM 16MB Cache SAS 3Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate
Refurbished Seagate BarraCuda ES.2 ST31000640SS 1TB 7200 RPM 16MB Cache SAS 3Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 9.5ms
  • Average Latency: 4.16ms
  • Height (maximum): 26.11mm
  • Model #: ST31000640SS
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  • $59.99 
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Dell F617N 300GB 15000 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Hard Drive Bare Drive
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DELL
Dell F617N 300GB 15000 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 2ms
  • NAND Flash Memory Type: Hard Drive
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: F617N
Seagate Constellation ES.3 ST4000NM0063 4 TB 3.5" Internal Hard Drive
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Seagate
Seagate Constellation ES.3 ST4000NM0063 4 TB 3.5" Internal Hard Drive
  • Average Latency: 4.16ms
  • Parts: 5 Year
  • Labor: 5 Year
  • Model #: ST4000NM0063
WD Red Pro 4TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD4001FFSX
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Used - Like New WD Red Pro 4TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD4001FFSX
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD4001FFSX
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Seagate Constellation ES.3 ST4000NM0053 4 TB 3.5" Internal Hard Drive
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Seagate Constellation ES.3 ST4000NM0053 4 TB 3.5" Internal Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Parts: 5 Year
  • Model #: ST4000NM0053
Seagate ST1200MM0139 1.20 TB 2.5" Internal Hard Drive - SAS - 10000rpm - 256 MB Buffer
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Seagate
Seagate ST1200MM0139 1.20 TB 2.5" Internal Hard Drive - SAS - 10000rpm - 256 MB Buffer
  • Average Latency: 12Gb/s
  • NAND Flash Memory Type: SLC
  • Model #: ST1200MM0139
Western Digital RE3 WD3202ABYS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Western Digital RE3 WD3202ABYS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.2ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: WD3202ABYS
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  • $146.00 
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Seagate Exos 7E10 ST10000NM018B 10TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive, 512e/4KN
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Seagate
Seagate Exos 7E10 ST10000NM018B 10TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive, 512e/4KN
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Model #: ST10000NM018B
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WD Purple Pro WD181PURP 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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WD Purple Pro WD181PURP 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD181PURP
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TOSHIBA X300 Pro HDWR51GXZSTB 16TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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TOSHIBA X300 Pro HDWR51GXZSTB 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 #: HDWR51GXZSTB

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