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WD Red Pro 6TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives -WD6005FFBX
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WD Red Pro 6TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives -WD6005FFBX
  • Brand: WD
  • Series: Red Pro
  • Capacity: 6TB
  • RPM: 7200 RPM
  • Model #: WD6005FFBX
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Seagate Exos X16 14TB 7200 RPM SATA 6Gb/s 3.5-Inch Enterprise Hard Drive (ST14000NM001G)
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Seagate Exos X16 14TB 7200 RPM SATA 6Gb/s 3.5-Inch Enterprise Hard Drive (ST14000NM001G)
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Model #: ST14000NM001G
Seagate IronWolf 10TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST10000VN0004
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Seagate IronWolf 10TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST10000VN0004
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST10000VN0004
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Seagate IronWolf 8TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST8000VN0022
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Seagate IronWolf 8TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST8000VN0022
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST8000VN0022
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Seagate Exos X18 18TB SAS 12Gb/s 3.5" Enterprise HDD - ST18000NM004J
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  • $445.00 
  • Free Shipping
Seagate Archive HDD v2 ST8000AS0002 8TB 5900 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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in 30 days
Seagate Archive HDD v2 ST8000AS0002 8TB 5900 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Parts: 30 DAYS WARRANTY
  • Model #: ST8000AS0002
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Western Digital RE3 WD1002FBYS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Western Digital RE3 WD1002FBYS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Brand: Western Digital
  • Series: RE3
  • Model: WD1002FBYS
  • Capacity: 1TB
  • Model #: WD1002FBYS
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
TOSHIBA MG03SCA400 4TB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Internal Hard Drive Bare Drive
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TOSHIBA MG03SCA400 4TB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Internal Hard Drive Bare Drive
  • Height (maximum): 26.1 mm
  • Width (maximum): 101.6 mm
  • Length (maximum): 147 mm
  • Model #: MG03SCA400
Seagate Video ST2000VM003 2TB 5900 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate Video ST2000VM003 2TB 5900 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: ST2000VM003
Seagate Constellation ES.3 ST2000NM0033 2TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
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Seagate Constellation ES.3 ST2000NM0033 2TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST2000NM0033
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Western Digital WD Green WD20EARX 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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TOSHIBA DT01ACA100 1TB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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TOSHIBA DT01ACA100 1TB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.17ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: DT01ACA100
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WD RE WD2000FYYZ 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
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WD RE WD2000FYYZ 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD2000FYYZ
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WD Gold 10TB Enterprise Class Hard Drive - 3.5" Internal - SATA (SATA/600) - 7200RPM - WD103KRYZ
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ST1000NM0033 Seagate 1TB 7.2K RPM SATA 6Gbps 3.5" LFF 128MB Cache Hard Drive
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Seagate
Refurbished ST1000NM0033 Seagate 1TB 7.2K RPM SATA 6Gbps 3.5" LFF 128MB Cache Hard Drive
  • Average Latency: 4.16ms
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: ST1000NM0033
Seagate Exos 12TB Enterprise HDD SATA 6Gb/s 512e/4Kn 7200 RPM 256MB Cache 3.5" Internal Hard Drive ST12000NM001G-OEM
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Seagate
Seagate Exos 12TB Enterprise HDD SATA 6Gb/s 512e/4Kn 7200 RPM 256MB Cache 3.5" Internal Hard Drive ST12000NM001G-OEM
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Parts: NO Manufacturer Warranty, Sell provide 5-year warranty
  • Model #: ST12000NM001G-OEM
Seagate SkyHawk AI ST14000VE0008 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate SkyHawk AI ST14000VE0008 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST14000VE0008
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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
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  • $547.49 
  • $11.20 Shipping
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Seagate BarraCuda 7200.10 ST380815AS 80GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate IronWolf 4TB NAS Hard Drive 5900 RPM 64MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST4000VN008
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Seagate IronWolf 4TB NAS Hard Drive 5900 RPM 64MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST4000VN008
  • Recording Technology: CMR
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST4000VN008
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Seagate Exos X12 12TB SAS 12Gb/s 3.5in Enterprise HDD ST12000NM0027 2A1201-001 OEM
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TOSHIBA DT01ACA100 1TB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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TOSHIBA DT01ACA100 1TB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Average Latency: 4.17ms
  • Parts: 2 Year
  • Labor: 30 days warranty
  • Model #: HDKPC03 DUP
  •  
  • $50.00 
  • Free Shipping
WD Purple Pro WD121PURP 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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WD Purple Pro WD121PURP 12TB 7200 RPM 256MB 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 #: WD121PURP
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Seagate IronWolf 6TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST6000VN0033
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Seagate IronWolf 6TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST6000VN0033
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST6000VN0033
Seagate IronWolf Pro 6TB 3.5" SATA 7200rpm Internal Hard Drive ST6000NE0023
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Seagate IronWolf Pro 6TB 3.5" SATA 7200rpm Internal Hard Drive ST6000NE0023
  • NAND Flash Memory Type: Hard Drive
  • Average Latency: 4.16ms
  • Features: Optimized for NAS with AgileArray. AgileArray enables dual-plane balancing and RAID optimization in multi-bay environments, with the most advanced power management possible. Actively protect your NAS with IronWolf Health Management focusing on prevention, intervention, and recovery. High performance means no lag time or downtime for users during workload traffic for the NAS.
  • Usage: Enterprise NAS Hard Drives
  • Model #: ST6000NE0023
Synology HAT5310-20T 20TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Enterprise 3.5" SATA HDD
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Synology HAT5310-20T 20TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Enterprise 3.5" SATA HDD
  • Height (maximum): 26.1 mm
  • Width (maximum): 101.85 mm
  • Length (maximum): 147 mm
  • Model #: HAT5310-20T
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WD Purple 6TB Surveillance Hard Disk Drive - 5700 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD60PURZ
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WD Purple 6TB Surveillance Hard Disk Drive - 5700 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD60PURZ
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD60PURZ
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Seagate SV35.6 ST2000VX000 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Surveillance Hard Drive Bare Drive
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Seagate SV35.6 ST2000VX000 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Surveillance Hard Drive Bare Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Model #: ST2000VX000
Seagate Exos X10 10TB 512e SATA 6Gb/s 7200 RPM 3.5-Inch Enterprise HDD (ST10000NM0086)
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Seagate Exos X10 10TB 512e SATA 6Gb/s 7200 RPM 3.5-Inch Enterprise HDD (ST10000NM0086)
  • NAND Flash Memory Type: SLC
  • Average Latency: 4.16ms
  • Features: Maximum Storage Capacity for High Rack Space Efficiency The Exos X10 enterprise hard drives support up to 10TB per drive, providing 25% more petabytes per rack. High storage densities allow the latest technology and greatest efficiencies to help catalyze the datasphere, enabling data center architects and IT professionals to deliver trusted
  • Height (maximum): 26.11mm
  • Model #: ST10000NM0086
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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:

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