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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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Hitachi Ultrastar A7K2000 2TB HUA722020ALA330 (0F10942) 2TB 32MB Cache 7200RPM SATA2 Enterprise Hard Drive - OEM w/ 1 Year Warranty
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Hitachi Ultrastar A7K2000 2TB HUA722020ALA330 (0F10942) 2TB 32MB Cache 7200RPM SATA2 Enterprise Hard Drive - OEM w/ 1 Year Warranty
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: HUA722020ALA330-OEM
ST1200MM0088 WXPCX Dell POWEREDGE 1.2TB 10K 12Gb/s 2.5" SAS Hard Drive W/Caddy
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SEAGATE BULK ST8000AS0003 8TB Exos 5E8 3.5 SATA 6Gb/s SP
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Seagate
SEAGATE BULK ST8000AS0003 8TB Exos 5E8 3.5 SATA 6Gb/s SP
  • NAND Flash Memory Type: Hard Drive
  • Usage: Ideal for Servers
  • Model #: ST8000AS0003
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  • $278.45 
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WD_Black 6TB Gaming Performance Internal Hard Drive HDD - 7200 RPM, 128 MB Cache, SATA Gb/s, 3.5" - WD6004FZWX (OEM)
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WD_Black 6TB Gaming Performance Internal Hard Drive HDD - 7200 RPM, 128 MB Cache, SATA Gb/s, 3.5" - WD6004FZWX (OEM)
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD6004FZWX
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WD Gold 6TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 128MB Cache 3.5 Inch - WD6002FRYZ
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WD Gold 6TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 128MB Cache 3.5 Inch - WD6002FRYZ
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD6002FRYZ
Seagate IronWolf Pro 10TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive ST10000NE0004
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in 30 days
Seagate IronWolf Pro 10TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive ST10000NE0004
  • Average Latency: 4.16ms
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST10000NE0004
Western Digital WD Green WD20EADS 2TB 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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TOSHIBA P300 HDWD130UZSVA 3TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive - Bulk
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TOSHIBA P300 HDWD130UZSVA 3TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive - Bulk
  • Average Latency: 4.17ms
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: HDWD130UZSVA
MaxDigital 4TB 7200RPM 64MB Cache SATA III 6.0Gb/s (Surveillance CCTV DVR Storage) 3.5" Internal Hard Drive w/2 Year Warranty
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MaxDigital 4TB 7200RPM 64MB Cache SATA III 6.0Gb/s (Surveillance CCTV DVR Storage) 3.5" Internal Hard Drive w/2 Year Warranty
  • Parts: 2 Year Warranty from Reseller
  • Labor: 2 Year Warranty from Reseller
  • Model #: MD4000GBDS-CCTV
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  • $129.99 
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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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Dell 400-AFYD 4 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
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  • $99.00 
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WD Gold 6TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6.0Gb/s 256MB Cache 3.5" Inch- WD6004FRYZ
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WD Gold 6TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6.0Gb/s 256MB Cache 3.5" Inch- WD6004FRYZ
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD6004FRYZ
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Western Digital Black WD2001FASS 2TB 7200 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  • $55.99 
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Seagate BarraCuda ST3320413AS 320GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  • $40.00 
  • Free Shipping
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HGST HUS724030ALA640 - 3TB 3.5" SATA 7,200 RPM 6Gb/s Hard Drive
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HGST HUS724030ALA640 - 3TB 3.5" SATA 7,200 RPM 6Gb/s Hard Drive
  • Brand: HGST
  • Model: HUS724030ALA640
  • Capacity: 3TB
  • RPM: 7200 RPM
  • Model #: HUS724030ALA640
WD Purple 14TB 3.5" SATA 7200rpm Internal Hard Drive WD140PURZ
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WD Purple 14TB 3.5" SATA 7200rpm Internal Hard Drive WD140PURZ
  • Average Latency: 6Gb/s
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD140PURZ
Seagate Constellation ES.2 ST32000645NS 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
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Seagate Constellation ES.2 ST32000645NS 2TB 7200 RPM 64MB Cache SATA 6.0Gb/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 #: ST32000645NS
Seagate Exos X16 16TB Enterprise HDD 12Gb/s SAS 512e/4Kn 7200 RPM 256MB Cache 3.5" Internal Hard Drive ST16000NM002G
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Seagate Exos X16 16TB Enterprise HDD 12Gb/s SAS 512e/4Kn 7200 RPM 256MB Cache 3.5" Internal Hard Drive ST16000NM002G
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Model #: ST16000NM002G
WD Gold 10TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD102KRYZ
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WD Gold 10TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD102KRYZ
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD102KRYZ
Seagate NAS HDD ST4000VN000 4TB 64MB Cache SATA 6.0Gb/s Internal Hard Drive
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Seagate NAS HDD ST4000VN000 4TB 64MB Cache SATA 6.0Gb/s Internal Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Model #: ST4000VN000
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WD Gold 16TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 512MB Cache 3.5 Inch - WD161KRYZ
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WD Gold 16TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 512MB Cache 3.5 Inch - WD161KRYZ
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD161KRYZ
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WD Ultrastar DC HC530 14TB SAS 12Gb/s 3.5" Enterprise HDD  WUH721414AL5204
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Western Digital
WD Ultrastar DC HC530 14TB SAS 12Gb/s 3.5" Enterprise HDD WUH721414AL5204
  • Height (maximum): 1"
  • Width (maximum): 4"
  • Length (maximum): 5.8"
  • Model #: WUH721414AL5204
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  • $674.45 
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WD Red Plus 2TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD20EFRX
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WD Red Plus 2TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD20EFRX
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD20EFRX
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Seagate Surveillance HDD ST2000VX003 2TB 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate Surveillance HDD ST2000VX003 2TB 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Parts: 3 Year
  • Model #: ST2000VX003
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  • $115.10 
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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