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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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Seagate ST8000VE000 Skyhawk AI 8TB SATA III 7200 RPM 256MB 3.5" Surveillance Hard Drive
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Seagate ST8000VE000 Skyhawk AI 8TB SATA III 7200 RPM 256MB 3.5" Surveillance Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Average Latency: 4.16ms
  • Features: 7200 RPM spindle speed. Full-track multiple-sector transfer capability without local processor intervention. High instantaneous (burst) data-transfer rates (up to 600MB per second). Native Command Queuing with command ordering to increase performance in demanding applications. Perpendicular recording technology provides the drives with increased areal density. PowerChoice for selectable power savings. SeaTools diagnostic software performs a drive self-test
  • Usage: For Video Surveillance
  • Model #: ST8000VE000
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HPE 507616-B21 2 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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HP
Refurbished HPE 507616-B21 2 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
  • NAND Flash Memory Type: SLC
  • Usage: Ideal for Servers
  • Model #: 507616-B21
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  • $34.99 
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WD Red Pro WD4003FFBX 4TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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WD Red Pro WD4003FFBX 4TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • NAND Flash Memory Type: Hard Drives
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: WD4003FFBX
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
Seagate BarraCuda 7200.12 ST3500413AS 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda 7200.12 ST3500413AS 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • NAND Flash Memory Type: Desktop
  • Parts: 2 years limited
  • Labor: 2 years limited
  • Model #: ST3500413AS
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  • $45.00 
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Seagate IronWolf 14TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST14000VN0008
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Seagate IronWolf 14TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST14000VN0008
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST14000VN0008
WD Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD40PURX
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WD Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD40PURX
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Parts: 3 Year
  • Model #: WD40PURX
Seagate 12TB HDD Exos X14 7200 RPM 512e/4Kn SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive (ST12000NM0008)
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Seagate 12TB HDD Exos X14 7200 RPM 512e/4Kn SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive (ST12000NM0008)
  • NAND Flash Memory Type: SLC
  • Average Latency: 4.16ms
  • Features: 14TB per drive for 40% more petabytes per rack Industry's lowest power and weight for optimum data center TCO Highest 14TB hard drive performance with enhanced caching, making it perfect for big data applications Hyperscale SATA model tuned for large data transfers PowerBalance feature optimizes IOPS/Watt Helium sealed-drive design with no porosity and uniform density Superior
  • Usage: For Enterprise Storage
  • Model #: ST12000NM0008
MDD 24TB 7200RPM 512MB Cache SATA 6.0Gb/s 3.5inch Internal Hard Drive for Surveillance Storage (MDD24TS51272DVR)- 5 Years Warranty
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  •  
  • $559.95 
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WD Red Pro 12TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive - WD122KFBX
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WD Red Pro 12TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive - WD122KFBX
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: WD122KFBX
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Seagate ST5000DM000 5TB 5900 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate ST5000DM000 5TB 5900 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: <8.5ms
  • Average Write Time: <9.5ms
  • Average Latency: 6Gb/s
  • Height (maximum): 26.1mm
  • Model #: ST5000DM000
  •  
  • $150.00 
  • Free Shipping
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Western Digital Blue WD2500AAKX 250GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Western Digital Blue WD2500AAKX 250GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Height (maximum): 25.40mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD2500AAKX
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Seagate Constellation ES.2 ST33000650SS 3TB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
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Seagate Constellation ES.2 ST33000650SS 3TB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 9.5ms
  • Average Latency: 4.16ms
  • Parts: 2 yrs
  • Model #: ST33000650SS
WD Red Plus 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD40EFRX
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WD Red Plus 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD40EFRX
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD40EFRX
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WD Purple WD23PURZ 2TB Hard Drive - 3.5" Internal - SATA (SATA/600) - Conventional Magnetic Recording (CMR) Method - Video Surveillance System Device Supported - 3 Year Warranty
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Seagate Exos 7E8 Enterprise 4TB 7200RPM 256MB 512N SATA 6Gb/s 3.5" Internal Hard Drive - ST4000NM000A
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Seagate Exos 7E8 Enterprise 4TB 7200RPM 256MB 512N SATA 6Gb/s 3.5" Internal Hard Drive - ST4000NM000A
  • NAND Flash Memory Type: Hard Drive
  • Parts: 5 Years
  • Labor: 5 Years
  • Model #: ST4000NM000A
  •  
  • $294.45 
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WL 2TB 64MB Cache 5400RPM SATA III (6.0Gb/s) 3.5" Internal Surveillance DVR Hard Drive - w/ 1 Year Warranty
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WL 2TB 64MB Cache 5400RPM SATA III (6.0Gb/s) 3.5" Internal Surveillance DVR Hard Drive - w/ 1 Year Warranty
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: WL2000GSA6454-PUR
  •  
  • $89.99 
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Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" (WD44PURZ)
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Western Digital
Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" (WD44PURZ)
  • Brand: Western Digital
  • Series: Purple
  • Capacity: 4TB
  • RPM: 7200 RPM
  • Model #: WD44PURZ
WD Gold 6TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD6003FRYZ
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WD Gold 6TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD6003FRYZ
  • Features: Conquer tough workloads with enterprise-grade WD Gold HDDs. Available in 1TB to 14TB capacities Enhanced reliability with up to 2.5M hours MTBF Specifically designed for use in enterprise-grade data centers and storage systems Improve performance with our vibration protection technology HelioSeal technology delivers high capacities with a low power draw [12TB and
  • Usage: For Enterprise Storage
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: WD6003FRYZ
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WD Purple Pro WD8001PURP 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive
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WD Purple Pro WD8001PURP 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD8001PURP
HGST Ultrastar He6 HUS726060ALS640 (0F18370) 6TB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Helium Platform Enterprise Hard Drive Bare Drive
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HGST Ultrastar He6 HUS726060ALS640 (0F18370) 6TB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Helium Platform Enterprise Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Height (maximum): 26.1mm
  • Width (maximum): 101.6(+/-0.25)mm
  • Length (maximum): 147mm
  • Model #: 0F18370
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WD Blue 4TB Desktop Hard Disk Drive - 5400 RPM SATA 6Gb/s 128MB Cache 3.5 Inch - WD40EZZX
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WD Blue 4TB Desktop Hard Disk Drive - 5400 RPM SATA 6Gb/s 128MB Cache 3.5 Inch - WD40EZZX
  • Brand: Western Digital
  • Series: Blue
  • Model: WD40EZZX
  • Capacity: 4TB
  • Model #: WD40EZZX
Seagate Constellation ES ST1000NM0011 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
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Seagate Constellation ES ST1000NM0011 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 9.5ms
  • Average Latency: 4.16ms
  • Parts: 2 yrs
  • Model #: ST1000NM0011
Seagate Enterprise Capacity 3.5'' HDD 8TB 7200 RPM 4Kn SATA 6Gb/s 256MB Cache Internal Hard Drive ST8000NM0045
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Seagate Enterprise Capacity 3.5'' HDD 8TB 7200 RPM 4Kn SATA 6Gb/s 256MB Cache Internal Hard Drive ST8000NM0045
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST8000NM0045
Seagate Enterprise Capacity 3.5'' HDD 6TB 7200 RPM 512e SAS 12Gb/s 256MB Cache Secure Model Internal Hard Drive ST6000NM0195
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Seagate
Seagate Enterprise Capacity 3.5'' HDD 6TB 7200 RPM 512e SAS 12Gb/s 256MB Cache Secure Model Internal Hard Drive ST6000NM0195
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST6000NM0195
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  • $199.10 
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Seagate EXOS X24 20TB SATA 6Gb/s ISE 3.5inch Hard drive - ST20000NM002H
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WL 2TB 64MB Cache 5400RPM SATA III (6.0Gb/s) (Low Power & Heavy Duty) 3.5" Internal Hard Drive (NAS & CCTV DVR) - w/ 1 Year Warranty
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WL 2TB 64MB Cache 5400RPM SATA III (6.0Gb/s) (Low Power & Heavy Duty) 3.5" Internal Hard Drive (NAS & CCTV DVR) - w/ 1 Year Warranty
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: WL2000GSA6454-DVR
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  • $79.99 
  • Free Shipping

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