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Seagate BarraCuda 7200.9 ST3802110A 80GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3802110A 80GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 11ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3802110A
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Seagate Cheetah 15K.4 ST373454SS 74GB 15000 RPM 8MB Cache Serial Attached SCSI (SAS) 3.5" Hard Drive Bare Drive
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Seagate
Seagate Cheetah 15K.4 ST373454SS 74GB 15000 RPM 8MB Cache Serial Attached SCSI (SAS) 3.5" Hard Drive Bare Drive
  • Average Seek Time: 3.5ms
  • Average Write Time: 4.0ms
  • Average Latency: 2ms
  • Parts: 5 years limited
  • Model #: ST373454SS
Hitachi GST Deskstar 5K3000 HDS5C3020ALA632 (0F12117) 2TB 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  • $85.00 
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Dell Hard drive - 1.2 TB 400-AJPI Hard drive
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WD3000HLFS Western Digital VELOCIRAPTOR 300GB 10K 3G 16MB 3.5in SATA Hard Drive
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  • $56.88 
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Seagate ST1200MM0139 1.20 TB 2.5" Internal Hard Drive - SAS - 10000rpm - 256 MB Buffer
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Seagate
Seagate ST1200MM0139 1.20 TB 2.5" Internal Hard Drive - SAS - 10000rpm - 256 MB Buffer
  • Average Latency: 12Gb/s
  • NAND Flash Memory Type: SLC
  • Model #: ST1200MM0139
SEAGATE ST1000NM001A 1TB 7200RPM 256MB SAS 3.5
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Seagate
SEAGATE ST1000NM001A 1TB 7200RPM 256MB SAS 3.5
  • NAND Flash Memory Type: Others
  • Average Latency: 12Gb/s
  • Features: Hard Drive
  • Parts: 5 Years
  • Model #: ST1000NM001A
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  • $75.00 
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Seagate SV35.5 ST3500410SV 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate SV35.5 ST3500410SV 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • NAND Flash Memory Type: Hard Drive
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST3500410SV
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  • $200.00 
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HGST Ultrastar He8 HUH728080AL5201 (0F23301) 8TB 7200 RPM 128MB Cache SAS 12Gb/s 3.5" Helium Platform Enterprise Hard Drive Bare Drive
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HGST Ultrastar He8 HUH728080AL5201 (0F23301) 8TB 7200 RPM 128MB Cache SAS 12Gb/s 3.5" Helium Platform Enterprise Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 9ms
  • Average Latency: 4.16ms
  • Height (maximum): 26.1mm
  • Model #: 0F23301
HP 652749-B21 7200 RPM SAS 6Gb/s 2.5" SFF SC Midline Hard Drive
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HP
HP 652749-B21 7200 RPM SAS 6Gb/s 2.5" SFF SC Midline Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 15.6 mm
  • Width (maximum): 75.7 mm
  • Length (maximum): 118.7 mm
  • Model #: 652749-B21
HPE - SERVER OPTIONS 861691-B21 1TB SATA 6G 7200 RPM 3.5IN LFF
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Seagate BarraCuda 7200.10 ST3250820AS 250GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive
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Seagate BarraCuda 7200.10 ST3250820AS 250GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 10ms
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Model #: ST3250820AS
  • $60.21
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  • $50.00 
  • Save: 16%
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HP 432320-001 146GB 10000 RPM SAS 3Gb/s 2.5" Internal Hard Drive Bare Drive
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HP 432320-001 146GB 10000 RPM SAS 3Gb/s 2.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 432320-001
0-HRS ST1000NM0023 Seagate 9ZM273-001 1TB 7200RPM 6Gbps 3.5" SAS Hard Drive
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  • $69.99 
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Seagate BarraCuda ES ST3500630NS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda ES ST3500630NS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 10ms
  • Average Latency: 4.16ms
  • Parts: 2 YRS
  • Model #: ST3500630NS
Hitachi GST Deskstar 7K2000 HDS722020ALA330 (0F10311) 2TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  • $140.00 
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DELL ENTERPRISE ACCESSORIES 400-AJRC 600GB HYBRID DELL 13G SAS
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DELL
DELL ENTERPRISE ACCESSORIES 400-AJRC 600GB HYBRID DELL 13G SAS
  • NAND Flash Memory Type: SLC
  • Average Latency: 12Gb/s
  • Usage: For Enterprise Storage
  • Model #: 400-AJRC
DELL ENTERPRISE ACCESSORIES 400-AJQD 1.2TB SAS 12GBPS 2.5IN 10K RPM
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DELL
DELL ENTERPRISE ACCESSORIES 400-AJQD 1.2TB SAS 12GBPS 2.5IN 10K RPM
  • Average Latency: 12Gb/s
  • Usage: For Enterprise Storage
  • Model #: 400-AJQD
HP 657750-S21 1TB 7200 RPM SATA 6.0Gb/s 3.5" LFF SC Midline Hard Drive S-Buy Bare Drive
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HP
HP 657750-S21 1TB 7200 RPM SATA 6.0Gb/s 3.5" LFF SC Midline Hard Drive S-Buy Bare Drive
  • Average Latency: 6Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 657750-S21
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  • $128.19 
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Seagate DB35 Series 7200.2 ST3802110ACE 80GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate
Seagate DB35 Series 7200.2 ST3802110ACE 80GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 18ms
  • Average Write Time: 20ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3802110ACE
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  • $70.00 
  • Free Shipping
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HP 581310-001 450GB 10000 RPM Serial Attached SCSI (SAS) 2.5" Internal Hard Drive Bare Drive
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HP
HP 581310-001 450GB 10000 RPM Serial Attached SCSI (SAS) 2.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 581310-001
Seagate BarraCuda 7200.10 ST3320820A 320GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.10 ST3320820A 320GB 7200 RPM 8MB 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 #: ST3320820A
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  • $150.00 
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Seagate BarraCuda 7200.10 ST3250410AS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda 7200.10 ST3250410AS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 10ms
  • Average Latency: 4.16ms
  • Parts: 3 years limited
  • Model #: ST3250410AS
Seagate BarraCuda 7200.10 ST3400620AS 400GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive
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Seagate BarraCuda 7200.10 ST3400620AS 400GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 10ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3400620AS
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  • $72.10 
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Seagate BarraCuda ES ST3320620NS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda ES ST3320620NS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3320620NS
  •  
  • $52.00 
  • Free Shipping
Seagate BarraCuda 7200.11 ST31000333AS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda 7200.11 ST31000333AS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST31000333AS
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  • $89.10 
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Seagate BarraCuda 7200.9 ST3250824A 250GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3250824A 250GB 7200 RPM 8MB 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 #: ST3250824A
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  • $141.19 
  • Free Shipping
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HGST Ultra 0F22790 6TB 7200 RPM 128MB Cache Serial Attached SCSI (SAS) 3.5" Enterprise Hard Drive Bare Drive
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  • $199.10 
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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