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Western Digital WD Green WD10EADS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Used - Like New Western Digital WD Green WD10EADS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 8.9ms
  • Height (maximum): 1
  • Width (maximum): 4
  • Length (maximum): 5.78"
  • Model #: WD10EADS
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WL 4TB 64MB Cache 5400RPM SATA III (6.0Gb/s) 3.5" Internal Surveillance DVR Hard Drive - w/ 1 Year Warranty
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WL 4TB 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 #: WL4000GSA6454-PUR
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  • $129.99 
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WD Purple WD102PURZ 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive
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WD Purple WD102PURZ 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD102PURZ
Seagate Exos X22 22TB SATA 6Gb/s 3.5" Enterprise Hard Drive - ST22000NM001E
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MaxDigitalData 4TB 64MB Cache 5900PM SATA 6.0Gb/s 3.5" Internal Surveillance CCTV DVR Hard Drive (MD4000GSA6459DVR) - w/ 2 Year Warranty
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MaxDigitalData 4TB 64MB Cache 5900PM SATA 6.0Gb/s 3.5" Internal Surveillance CCTV DVR Hard Drive (MD4000GSA6459DVR) - w/ 2 Year Warranty
  • Parts: 2 Years Warranty from Reseller
  • Labor: 2 Years Warranty from Reseller
  • Model #: MD4000GSA6459DVR
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  • $109.99 
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Seagate 1TB BarraCuda 7200 RPM 128MB Cache SATA 6.0Gb/s 2.5" Laptop Internal Hard Drive ST1000LM049
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Seagate 1TB BarraCuda 7200 RPM 128MB Cache SATA 6.0Gb/s 2.5" Laptop Internal Hard Drive ST1000LM049
  • Height (maximum): 7mm
  • Width (maximum): 69.85mm
  • Length (maximum): 100.35mm
  • Model #: ST1000LM049
  • $90.00 - $105.00
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Seagate BarraCuda 7200.10 ST3320620A 320GB 7200 RPM 16MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive (Perpendicular Recording) Bare Drive
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Seagate BarraCuda 7200.10 ST3320620A 320GB 7200 RPM 16MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive (Perpendicular Recording) Bare Drive
  • Average Seek Time: 11ms
  • Average Write Time: 12ms
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Model #: ST3320620A
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Seagate SkyHawk AI ST18000VE002 18 TB Hard Drive 3.5" Internal SATA SATA/600
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Seagate SkyHawk AI ST18000VE002 18 TB Hard Drive 3.5" Internal SATA SATA/600
  • NAND Flash Memory Type: Hard Drive
  • Model #: ST18000VE002
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Seagate Exos 7E10 ST10000NM017B 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate Exos 7E10 ST10000NM017B 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Model #: ST10000NM017B
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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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WL 2 Terabyte (2TB) 64MB Cache 7200RPM SATA III (6.0Gb/s) 3.5" Internal Destkop Hard Drive (PC/Mac/CCTV DVR)- w/ 1 Year Warranty
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WL 2 Terabyte (2TB) 64MB Cache 7200RPM SATA III (6.0Gb/s) 3.5" Internal Destkop Hard Drive (PC/Mac/CCTV DVR)- w/ 1 Year Warranty
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: WL2000SATA6472-S3
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  • $79.99 
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Seagate IronWolf Pro ST18000NT001 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate IronWolf Pro ST18000NT001 18TB 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 #: ST18000NT001
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HGST Ultrastar 7K4000 HUS724030ALS640 3TB 7.2K RPM SAS 6Gb/s 64MB 3.5" HD
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  • $40.00 
WD WUH721818AL5204 18TB SAS 12Gb/s 7.2K RPM 512M 0F38353 512e/4Kn SE HDD
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  • $409.00 
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Western Digital Blue WD3200AAKS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Western Digital Blue WD3200AAKS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 8.9ms
  • Average Write Time: 10.9ms
  • Average Latency: 4.2ms
  • Model #: WD3200AAKS
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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  • $479.95 
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WD Black 500GB Performance Desktop Hard Disk Drive - 7200 RPM SATA 6Gb/s 64MB Cache 3.5 Inch - WD5003AZEX
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Seagate ST1000NM0008 1 TB 3.5" SATA 7200rpm Internal Hard Drive
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Seagate ST1000NM0008 1 TB 3.5" SATA 7200rpm Internal Hard Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: SLC
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST1000NM0008
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HGST Ultrastar He10 HUH721010ALE604 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Helium Platform Enterprise Hard Drive Bare Drive
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Refurbished HGST Ultrastar He10 HUH721010ALE604 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Helium Platform Enterprise Hard Drive Bare Drive
  • Average Seek Time: 8ms
  • Average Write Time: 8.6ms
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Model #: HUH721010ALE604
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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
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  • $50.00 
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HITACH DESKSTAR 3TB 7200RPM 64MB CACHE  6GB PER SECOND DAT TRANSFER RATE 3.5 INCH HARD DRIVE HDS723030ALA640
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  • $55.00 
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Seagate Constellation ES ST32000444SS 2TB 7200 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Enterprise Hard Drive Bare Drive
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Seagate Constellation ES ST32000444SS 2TB 7200 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Enterprise Hard Drive Bare Drive
  • Brand: Seagate
  • Series: Constellation ES
  • Model: ST32000444SS
  • Capacity: 2TB
  • Model #: ST32000444SS
Seagate IronWolf Pro 22TB Enterprise NAS Internal HDD – CMR 3.5in SATA 6Gb/s 7200 RPM (ST22000NT001)
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Seagate IronWolf Pro 22TB Enterprise NAS Internal HDD – CMR 3.5in SATA 6Gb/s 7200 RPM (ST22000NT001)
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST22000NT001
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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
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  • $150.00 
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Seagate Exos 7E10 ST8000NM018B 8TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive, 512e/4KN
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Seagate
Seagate Exos 7E10 ST8000NM018B 8TB 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 #: ST8000NM018B
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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