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HGST HUS724040ALS640 Ultrastar 7K4000 HUS724040ALS640 4 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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Refurbished HGST HUS724040ALS640 Ultrastar 7K4000 HUS724040ALS640 4 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
  • Part Number: HUS724040ALS640
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: HUS724040ALS640
TOSHIBA MD04ACA400 4TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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TOSHIBA MD04ACA400 4TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Average Latency: 4.17ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: MD04ACA400
0F29535 Dell 12TB 7.2K SAS 12G LFF Hard Drive
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432341-B21 HP 750GB SATA 7.2K 3.5-inch 1.5G Hard Drive 432401-001 397377-009
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Refurbished 432341-B21 HP 750GB SATA 7.2K 3.5-inch 1.5G Hard Drive 432401-001 397377-009
  • Average Seek Time: 11ms
  • Part Number: 432341-B21
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: 432341-B21
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  • $27.00 
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Seagate Pipeline HD ST2000VM002 2TB 5900 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate Pipeline HD ST2000VM002 2TB 5900 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 12ms
  • Average Write Time: 13ms
  • Parts: 2 yrs
  • Labor: 2 yrs
  • Model #: ST2000VM002
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  • $77.00 
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Western Digital WD40EZRX?CAREEXT 4TB 3.5" Internal Hard Drive
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  • $179.00 
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HGST 0J22423 Travelstar 7K1000 HTS721010A9E630 1 TB Hard Drive - 2.5" Internal - SATA (SATA/600)
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Refurbished HGST 0J22423 Travelstar 7K1000 HTS721010A9E630 1 TB Hard Drive - 2.5" Internal - SATA (SATA/600)
  • Average Seek Time: 12ms
  • Average Latency: 4.2ms
  • Usage: For Daily Computing
  • Height (maximum): 9.5mm
  • Model #: 0J22423
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  • $49.00 
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862138-001 HP G8-G10 6-TB 6G 7.2K 3.5 SATA 512e Hard Drive
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ST10000NM0086 Seagate ENTERPRISE 2AA101-038 10TB 7.2K RPM 6Gb/s 3.5" SATA HDD Hard Drive
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  • $389.95 
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WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 256MB Cache, 3.5 Inch - WD101EFBX-NE
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WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 256MB Cache, 3.5 Inch - WD101EFBX-NE
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: WD101EFBX
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Seagate SkyHawk AI ST10000VE0008 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate SkyHawk AI ST10000VE0008 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST10000VE0008
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Seagate ST3500414CS 500GB 5900 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate ST3500414CS 500GB 5900 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: <14.0ms (read) <15.0ms (write)
  • Average Latency: 5.1ms
  • NAND Flash Memory Type: Desktop
  • Parts: 2 Years Warranty from Reseller
  • Model #: ST3500414CS
  • $64.99
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  • $39.10 
  • Save: 39%
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Seagate BarraCuda 7200.9 ST3402111A 40GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3402111A 40GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 11ms
  • Average Write Time: 12ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3402111A
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  • $100.00 
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U795J Dell EqualLogic 500GB 7200RPM 3.5" SATA Hard Drive - In PS100E PS200E PS300E PS400E Tray
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  • $39.99 
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Dell MY58D // HUS724030ALS640 SAS 3TB 7.2K 3.5" HDD
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Seagate Skyhawk 6TB Video Internal HDD – 3.5 Inch SATA 6Gb/s 256MB Cache for  (ST6000VX009)
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Seagate Skyhawk 6TB Video Internal HDD – 3.5 Inch SATA 6Gb/s 256MB Cache for (ST6000VX009)
  • NAND Flash Memory Type: Hard Drives
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Model #: ST6000VX009
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Seagate Exos 7E10 8TB SATA Video Surveillance Hard Drive ST8000NM019B
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Seagate
Seagate Exos 7E10 8TB SATA Video Surveillance Hard Drive ST8000NM019B
  • NAND Flash Memory Type: SLC
  • Parts: 5 Year
  • Model #: ST8000NM019B
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YJ0GR HUC106030CSS60 Dell 300GB 10K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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  • $40.00 
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XY986 Dell - 2TB 7.2K RPM 12Gb/s SAS 2.5"
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DELL
XY986 Dell - 2TB 7.2K RPM 12Gb/s SAS 2.5"
  • Model #: d83-109409000123738
Hitachi - HGST ULTRASTAR 3.5 4TB 7200RPM SATA III 6GBPS 64MB CACHE ENTERPRISE HARD DRIVE W
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HP 652611-B21 300GB 15000 RPM SAS 6Gb/s 2.5" SFF SC Enterprise Hard Drive
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HP
HP 652611-B21 300GB 15000 RPM SAS 6Gb/s 2.5" SFF SC Enterprise Hard Drive
  • Height (maximum): 15.6 mm
  • Width (maximum): 75.7 mm
  • Length (maximum): 118.7 mm
  • Parts: 3 Year
  • Model #: 652611-B21
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Seagate 4KN 6 TB 3.5" Internal Hard Drive ST6000NM0014 (ST6000NM0014)
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  • $347.45 
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LOT OF 10 - Dell 1P7DP ST2000NM0023 2TB 7200RPM 6Gbps 3.5" SAS SERVER Hard Drive
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  • $950.00 
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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 ST10000VN0008
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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 ST10000VN0008
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: CMR
  • 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: For NAS systems
  • Model #: ST10000VN0008
ST4000NM0023 4TB 7.2K SAS 3.5" 6G HDD for Dell T620 T630 T640 T710
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  • $174.95 
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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