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Seagate Savvio 10K.6 ST450MM0026 450 GB 2.5" Internal Hard Drive
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  • $114.19 
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Dell 342-5521 1.2TB 10000 RPM Serial Attached SCSI 2 2.5" Internal Hard Drive Bare Drive
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DELL
Dell 342-5521 1.2TB 10000 RPM Serial Attached SCSI 2 2.5" Internal Hard Drive Bare Drive
  • Average Latency: 12Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 342-5521
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Seagate/IBM Exos X16 ST16000NM002G 16TB 7.2K RPM SAS 12Gb/s 512e/4Kn 3.5in Enterprise Hard Drive
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Seagate
Refurbished Seagate/IBM Exos X16 ST16000NM002G 16TB 7.2K RPM SAS 12Gb/s 512e/4Kn 3.5in Enterprise Hard Drive
  • Brand: Seagate/IBM
  • Series: Exos X16
  • Model: ST16000NM002G
  • Capacity: 16TB
  • Model #: ST16000NM002G
Hitach Deskstar 7K1000.C HDS721050CLA662 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Refurbished Hitach Deskstar 7K1000.C HDS721050CLA662 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 8.9ms
  • Windows Vista: Works with Windows Vista
  • Model #: HDS721050CLA662
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4TB Seagate Enterprise 3.5 Inch SATA III 6Gb/s 7200RPM 256MB Cache Internal Hard Drive
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BUFFALO 3TB Replcement  HD TeraStation Model OP-HD3.0BST-3Y
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  • $149.99 
  • $11.20 Shipping
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Dell 342-2083 450GB 15000 RPM Serial Attached SCSI 3.5" Internal Hard Drive Bare Drive
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Seagate HDD ST600MP0136 600GB 15K HDD 256MB 12Gb/s SAS Bare
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Seagate
Seagate HDD ST600MP0136 600GB 15K HDD 256MB 12Gb/s SAS Bare
  • NAND Flash Memory Type: SLC
  • Usage: For Enterprise Storage
  • Parts: 5 Year
  • Model #: ST600MP0136
TOSHIBA MK2001TRKB 2TB 7200 RPM 16MB Cache SAS 6Gb/s 3.5" Enterprise Hard Drive Bare Drive
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TOSHIBA MK2001TRKB 2TB 7200 RPM 16MB Cache SAS 6Gb/s 3.5" Enterprise Hard Drive Bare Drive
  • Average Seek Time: 9.5ms
  • Average Latency: 4.17ms
  • NAND Flash Memory Type: Enterprise
  • Model #: MK2001TRKB
HPE 1.80TB 2.5" SAS 10000rpm Internal Hard Drive R0Q56A
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HPE 1.80TB 2.5" SAS 10000rpm Internal Hard Drive R0Q56A
  • NAND Flash Memory Type: Others
  • Model #: R0Q56A
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Western Digital 20TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD201KFGX
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Western Digital 20TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD201KFGX
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD201KFGX
  • $1,095.00 - $1,230.00
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HGST HDS721050CLA362 (0F10381) 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Hitachi GST Ultrastar 15K600 HUS156045VLS600 (0B23662) 450GB 15000 RPM 64MB Cache SAS 6Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
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Hitachi GST Ultrastar 15K600 HUS156045VLS600 (0B23662) 450GB 15000 RPM 64MB Cache SAS 6Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
  • Average Seek Time: 3.4ms
  • Average Latency: 2ms
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: HUS156045VLS600
HP 872479-B21 - HP 1.2TB 2.5" SAS 10K 12Gb/s Hard Drive
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HP
HP 872479-B21 - HP 1.2TB 2.5" SAS 10K 12Gb/s Hard Drive
  • NAND Flash Memory Type: SLC
  • Model #: 872479-B21
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Western Digital WD VelociRaptor WD3000HLFS 300GB 10000 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Used - Very Good Western Digital WD VelociRaptor WD3000HLFS 300GB 10000 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 4.2ms
  • Average Write Time: 4.7ms
  • Average Latency: 3ms (nominal)
  • Parts: 5 years limited
  • Model #: WD3000HLFS
  • $93.99
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  • $65.10 
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HP 718162-S21 1.2TB 10000 RPM SAS 6Gb/s 2.5" Internal Hard Drive Bare Drive
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HP
HP 718162-S21 1.2TB 10000 RPM SAS 6Gb/s 2.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • NAND Flash Memory Type: others
  • Model #: 718162-S21
HGST HUS726040ALS210 - HGST 4TB 3.5" SAS 7.2K 12Gb/s Hard Drive
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HGST HUS726040ALS210 - HGST 4TB 3.5" SAS 7.2K 12Gb/s Hard Drive
  • Features: Instant Secure Erase drive
  • Usage: For Enterprise Storage
  • Model #: HUS726040ALS210
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  • $137.10 
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DELL ENTERPRISE ACCESSORIES 400-ATJG 6GBPS 2.5IN 7200RPM SERIAL ATA
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  • $153.00 
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TOSHIBA AL13SEB900 900GB 10500 RPM 64MB Cache SAS 6Gb/s 2.5" Enterprise Hard Drive
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TOSHIBA AL13SEB900 900GB 10500 RPM 64MB Cache SAS 6Gb/s 2.5" Enterprise Hard Drive
  • Average Seek Time: 3.7ms
  • Average Write Time: 4.1ms
  • Average Latency: 2.86ms
  • Height (maximum): 15mm
  • Model #: AL13SEB900
HP 652589-B21 10000 RPM SAS 6Gb/s 2.5" SFF SC Enterprise Hard Drive
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HP 652589-B21 10000 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 #: 652589-B21
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HGST/WD Ultrastar 4TB 7200 RPM 512e SATA 6Gb/s 3.5-Inch Enterprise Hard Drive (HUS726T4TALE6L4)
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HGST/WD Ultrastar 4TB 7200 RPM 512e SATA 6Gb/s 3.5-Inch Enterprise Hard Drive (HUS726T4TALE6L4)
  • Usage: For Enterprise Storage
  • Height (maximum): 26.10mm
  • Model #: HUS726T4TALE6L4
HP Midline 454146-B21 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive
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HP Midline 454146-B21 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive
  • Average Seek Time: 8.5ms
  • Average Latency: 3Gb/s
  • NAND Flash Memory Type: Hard Drive
  • Parts: 1 year limited
  • Model #: 454146-B21
Seagate ST1000VX013 1TB Skyhawk 5400 Hard Drive
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Seagate
Seagate ST1000VX013 1TB Skyhawk 5400 Hard Drive
  • Part Number: ST1000VX013
  • Model #: ST1000VX013
Seagate Enterprise Capacity 3.5" HDD 4TB 7200 RPM 512n SAS 12Gb/s 128MB Cache Secure Model Internal Hard Drive ST4000NM0065
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Seagate
Seagate Enterprise Capacity 3.5" HDD 4TB 7200 RPM 512n SAS 12Gb/s 128MB Cache Secure Model Internal Hard Drive ST4000NM0065
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST4000NM0065
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  • $229.45 
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WD Caviar Black WD1002FAEX 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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WD Caviar Black WD1002FAEX 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Brand: WD
  • Series: Caviar Black
  • Capacity: 1TB
  • RPM: 7200 RPM
  • Model #: WD1002FAEX
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Western Digital WD Green WD15EARS 1.5TB 7200 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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HP 781518-B21 1.2TB 10000 RPM SAS 12Gb/s 2.5" SFF SC Enterprise Hard Drive
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HP
HP 781518-B21 1.2TB 10000 RPM SAS 12Gb/s 2.5" SFF SC Enterprise Hard Drive
  • Features: This HP 1.2TB SAS 12Gb/s 10K RPM SFF 2.5" SC Enterprise Hard Drive is a superior storage solution. With some storage requirements escalating and others becoming more complex, factors such as flexibility, performance, increased reliability, greater density, security, scalability and accessibility are more critical than ever. Today's organizations consist of
  • Usage: For Enterprise Storage
  • Model #: 781518-B21
Seagate Constellation.2 St91000640ns 1 Tb Internal Hard Drive 7200 Rpm - Serial Ata/600 - Serial Ata - 2.5"
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  • $96.70 
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  • $86.02 - $96.70
WD Blue 4TB Desktop Hard Disk Drive - 5400 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD40EZAZ
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Used - Like New WD Blue 4TB Desktop Hard Disk Drive - 5400 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD40EZAZ
  • Recording Technology: SMR
  • Features: Tested For Compatibility We perform tests on hundreds of systems and a multitude of platforms in our F.I.T. Lab to give our customers confidence that our drives will work in their systems. Low Power Consumption State-of-the-art seeking algorithms and advanced power management features help ensure low power consumption. NoTouch Ramp Load Technology Safely positions the
  • Usage: For Daily Computing
  • Height (maximum): 26.10mm
  • Model #: WD40EZAZ
Seagate Constellation.2 ST91000642SS 1TB 7200 RPM 64MB Cache SAS 6Gb/s 2.5" Internal Enterprise Hard Drive Bare Drive
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  • $184.45 
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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