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WD Red Pro 16TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive - WD161KFGX
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WD Red Pro 16TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive - WD161KFGX
  • Brand: WD
  • Series: Red Pro
  • Capacity: 16TB
  • RPM: 7200 RPM
  • Model #: WD161KFGX
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WD Blue 1TB Desktop Hard Disk Drive - 7200 RPM SATA 6Gb/s 64MB Cache 3.5 Inch - WD10EZEX
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WD Blue 1TB Desktop Hard Disk Drive - 7200 RPM SATA 6Gb/s 64MB Cache 3.5 Inch - WD10EZEX
  • Brand: WD
  • Series: Blue
  • Capacity: 1TB
  • RPM: 7200 RPM
  • Model #: WD10EZEX
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Dell 7200RPM Serial ATA 6 Gbps 512n 3.5in Hot-plug Drive - 1 TB,CK
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833926-B21 HP 2TB 7.2K 12Gbps 3.5" Midline SAS Hard Drive 820409-001 834133-001
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Used - Like New 833926-B21 HP 2TB 7.2K 12Gbps 3.5" Midline SAS Hard Drive 820409-001 834133-001
  • Part Number: 833926-B21
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: 833926-B21-NB
Axiom 1 Tb 3.5 Internal Hard Drive - Sata - 7200 Rpm - 64
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Transcend MTS602M 256 GB Solid State Drive - M.2 2260 Internal - SATA [SATA/600]
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  •  
  • $199.99 
  • Free Shipping
Seagate BarraCuda 7200.9 ST3500641AS-RK 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Retail Kit
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Seagate BarraCuda 7200.9 ST3500641AS-RK 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Retail Kit
  • Height (maximum): 22.23mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.05mm
  • Model #: ST3500641AS-RK
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Seagate Exos X20 ST20000NM007D 20TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive
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Seagate
Used - Very Good Seagate Exos X20 ST20000NM007D 20TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive
  • Brand: Seagate
  • Series: Exos X20
  • Capacity: 20TB
  • RPM: 7200 RPM
  • Model #: ST20000NM007D
  •  
  • $608.49 
  • $11.20 Shipping
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Seagate Exos 16TB Enterprise HDD X18 SATA 6Gb/s 512e/4Kn 7200 RPM 256MB Cache 3.5" Internal Hard Drive (ST16000NM000J)
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Seagate
Used - Very Good Seagate Exos 16TB Enterprise HDD X18 SATA 6Gb/s 512e/4Kn 7200 RPM 256MB Cache 3.5" Internal Hard Drive (ST16000NM000J)
  • NAND Flash Memory Type: Hard Drive
  • Average Latency: 4.16ms
  • Features: Market-leading 16TB HDD offering the highest capacity available for more petabytes per rack* Highly reliable performance with enhanced caching, making it the logical choice for cloud data centre and massive scale-out data centre applications Hyperscale SATA model tuned for large data transfers and low latency PowerBalance feature optimises Watts/TB Maximise total cost of ownership
  • Usage: For Enterprise Storage
  • Model #: ST16000NM000J
  •  
  • $526.47 
  • $11.20 Shipping
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Seagate SkyHawk AI ST24000VE002 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate
Used - Very Good Seagate SkyHawk AI ST24000VE002 24TB 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 #: ST24000VE002
  •  
  • $705.79 
  • $11.20 Shipping
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Seagate BarraCuda Green ST2000DL003 2TB 5900 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda Green ST2000DL003 2TB 5900 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Desktop
  • Parts: 1 Year
  • Model #: ST2000DL003
Seagate BarraCuda Green ST1000DL002 1TB 5900 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Bare Drive Bare Drive
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Seagate BarraCuda Green ST1000DL002 1TB 5900 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Bare Drive Bare Drive
  • Average Seek Time: 12ms
  • Average Write Time: 13ms
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Model #: ST1000DL002
Western Digital Blue WD2500AAKS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  • $18.74 
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Western Digital Caviar GP WD7500AACS 750GB 5400 to 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Used - Very Good Western Digital Caviar GP WD7500AACS 750GB 5400 to 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 8.9ms
  • Average Latency: 5.6ms
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: WD7500AACS
  •  
  • $53.74 
  • Free Shipping
Seagate Exos 16TB Enterprise HDD X18 SATA 6Gb/s 512e/4Kn 7200 RPM 256MB Cache 3.5" Internal Hard Drive (ST16000NM000J)
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  •  
  • $501.96 
  • $11.20 Shipping
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Seagate Exos X20 ST20000NM007D 20TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive
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Seagate
Used - Good Seagate Exos X20 ST20000NM007D 20TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Model #: ST20000NM007D
  •  
  • $577.99 
  • $11.20 Shipping
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Seagate Exos X20 ST20000NM007D 20TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive
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Seagate
Used - Acceptable Seagate Exos X20 ST20000NM007D 20TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive
  • Brand: Seagate
  • Series: Exos X20
  • Capacity: 20TB
  • RPM: 7200 RPM
  • Model #: ST20000NM007D
  •  
  • $547.49 
  • $11.20 Shipping
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Seagate Exos 16TB Enterprise HDD X18 SATA 6Gb/s 512e/4Kn 7200 RPM 256MB Cache 3.5" Internal Hard Drive (ST16000NM000J)
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  •  
  • $477.45 
  • $11.20 Shipping
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Seagate (Recertified) Exos X 28TB Internal Hard Drive HDD - 3.5 In CMR SATA 6Gb/s, 7200 RPM, 512MB Cache, 2.5M MTBF (ST28000NM000C)
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Seagate (Recertified) Exos X 24TB Internal Hard Drive HDD - 3.5 In CMR SATA 6Gb/s, 7200 RPM, 512MB Cache, 2.5M MTBF (ST24000NM000C)
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Refurbished Seagate (Recertified) Exos X 24TB Internal Hard Drive HDD - 3.5 In CMR SATA 6Gb/s, 7200 RPM, 512MB Cache, 2.5M MTBF (ST24000NM000C)
  • Part Number: ST24000NM000C
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST24000NM000C
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Seagate Exos X16 ST14000NM005G 14TB 7.2K RPM SATA 6Gb/s 512e CMR 3.5in Enterprise HDD
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Seagate
Refurbished Seagate Exos X16 ST14000NM005G 14TB 7.2K RPM SATA 6Gb/s 512e CMR 3.5in Enterprise HDD
  • Height (maximum): 25.4mm
  • Width (maximum): 101.6mm
  • Length (maximum): 147.32mm
  • Model #: ST14000NM005G
  •  
  • $348.50 
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WD Ultrastar DC HC530 14TB SATA 6Gb/s 3.5-Inch Data Center HDD - WUH721414ALE604 (0F31156)
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Refurbished WD Ultrastar DC HC530 14TB SATA 6Gb/s 3.5-Inch Data Center HDD - WUH721414ALE604 (0F31156)
  • Part Number: 0F31156
  • Features: Helium sealed, secure erase, power disable, TDMR
  • Usage: For Enterprise Storage
  • Parts: 5 Years Warranty
  • Model #: WUH721414ALE604-0F31156
MDD MDD18TSATA25672E18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Enterprise Hard Drive
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Refurbished MDD MDD18TSATA25672E18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Enterprise Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Parts: 5 Years
  • Model #: MDD18TSATA25672E
  •  
  • $439.99 
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Seagate ST2000NM0055 2 TB 3.5" Internal Hard Drive - SATA - 7200rpm - 128 MB Buffer
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Seagate
Refurbished Seagate ST2000NM0055 2 TB 3.5" Internal Hard Drive - SATA - 7200rpm - 128 MB Buffer
  • Brand: Seagate
  • Series: Exos 7E8
  • Model: ST2000NM0055
  • Capacity: 2TB
  • Model #: ST2000NM0055
Western Digital IU HA570 WD240EDGZ 24TB 7.2K RPM SATA 6Gb/s 512e 512MB 3.5in Recertified HDD
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Western Digital
Refurbished Western Digital IU HA570 WD240EDGZ 24TB 7.2K RPM SATA 6Gb/s 512e 512MB 3.5in Recertified HDD
  • Brand: Western Digital
  • Series: IU HA570
  • Model: WD240EDGZ
  • Capacity: 24TB
  • Model #: WD240EDGZ
  •  
  • $639.00 
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Seagate ST18000NM004J Exos X18 ST18000NM004J 18 TB Hard Drive - Internal - SAS (12Gb/s SAS)
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Seagate
Refurbished Seagate ST18000NM004J Exos X18 ST18000NM004J 18 TB Hard Drive - Internal - SAS (12Gb/s SAS)
  • Part Number: ST18000NM004J
  • NAND Flash Memory Type: SLC
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: ST18000NM004J
Seagate Exos X16 16TB 7.2K RPM SATA 6Gb/s 512e/4Kn 256MB 3.5" Enterprise HDD - ST16000NM001G
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Refurbished Seagate Exos X16 16TB 7.2K RPM SATA 6Gb/s 512e/4Kn 256MB 3.5" Enterprise HDD - ST16000NM001G
  • Brand: Seagate
  • Capacity: 16TB
  • RPM: 7200 RPM
  • Interface: SATA 6.0Gb/s
  • Model #: ST16000NM001G
MaxDigitalData 3TB 32MB Cache 5700PM SATA 6.0Gb/s 3.5" Internal Surveillance CCTV DVR Hard Drive (MD3000GSA3257DVR) - 2 Year Warranty
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  • $98.99 
  • Free Shipping
Seagate BarraCuda ST24000DM001 24TB 7200 RPM SATA 6.0Gb/s 3.5"  Hard Drive Bare Drive
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Seagate
Refurbished Seagate BarraCuda ST24000DM001 24TB 7200 RPM SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
  • Brand: Seagate
  • Series: BarraCuda
  • Capacity: 24TB
  • RPM: 7200 RPM
  • Model #: ST24000DM001
WD WD60PURX Purple WD60PURX 6TB Surveillance 3.5" Internal Hard Drive
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Western Digital
Refurbished WD WD60PURX Purple WD60PURX 6TB Surveillance 3.5" Internal Hard Drive
  • NAND Flash Memory Type: SLC
  • Features: WD Purple surveillance storage is built for 24/7 always-on surveillance in high-definition security systems that use up to eight hard drives and up to 32 cameras. Exclusive AllFrame technology works with ATA streaming to reduce error pixilation and video interruptions that occur when desktop hard drives are incorrectly used as
  • Usage: For Video Surveillance
  • Parts: 30 DAYS WARRANTY
  • Model #: WD60PURX
Western Digital WD5003AZEX Caviar Black 3.5" 500GB SATA Hard Drive
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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:

the Muttonmastwer
5/11/2026 11:18:09 AM
Hasn't broken yet

“ I have it attached via USB on my desktop and it has all my work on it, safe from Windoze crash damage or erasure on OS re-installs. ”

WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 16MB Cache 3.5 Inch - WD5000AAKX