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Seagate Cheetah 10K.7 ST3300007FC 300GB 10000 RPM 8MB Cache 2 Gbit/sec Fibre Channel 3.5" Hard Drive Bare Drive
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Seagate
Used - Like New Seagate Cheetah 10K.7 ST3300007FC 300GB 10000 RPM 8MB Cache 2 Gbit/sec Fibre Channel 3.5" Hard Drive Bare Drive
  • Average Seek Time: 4.7ms
  • Average Write Time: 5.3ms
  • Average Latency: 3ms
  • Height (maximum): 25.40mm
  • Model #: ST3300007FC
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Seagate Exos 10E2400 ST600MM0009 600GB 10000 RPM 128MB Cache SAS 12Gb/s 2.5" Internal Hard Drive 512N
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Seagate
Seagate Exos 10E2400 ST600MM0009 600GB 10000 RPM 128MB Cache SAS 12Gb/s 2.5" Internal Hard Drive 512N
  • Height (maximum): 15.00mm
  • Width (maximum): 70.10mm
  • Length (maximum): 100.45mm
  • Model #: ST600MM0009
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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 Hard drive - 1.2 TB 400-AJPI Hard drive
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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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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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Hitachi GST Ultrastar A7K2000 0F10452 2TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  •  
  • $85.00 
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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
Seagate Cheetah NS.2 ST3600002SS 600GB 10000 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate
Seagate Cheetah NS.2 ST3600002SS 600GB 10000 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 2.98ms
  • Average Write Time: 3.8ms
  • Average Latency: 4.4ms
  • Features: Seagate Cheetah ST3600002SS NS.2 drives reduce costs for 3.5-inch Tier 1 solutions, helping to sustain business. It is 600 GB of capacity, which is the highest capacity of any Tier 1 mission critical drive. This higher capacity reduces storage costs per GB and increases capacity per watt. The drive also
  • Model #: ST3600002SS
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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Seagate Exos X18 ST14000NM001J 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive, SED
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Seagate
Seagate Exos X18 ST14000NM001J 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive, SED
  • Average Latency: 4.16ms
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST14000NM001J
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Dell 4 TB Hard Drive 3.5" Internal SATA SATA/600 400AUUX
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TOSHIBA MBF245LRC 450GB 10025 RPM 16MB Cache SAS 6Gb/s 2.5" Enterprise Hard Drive
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TOSHIBA MBF245LRC 450GB 10025 RPM 16MB Cache SAS 6Gb/s 2.5" Enterprise Hard Drive
  • Height (maximum): 15mm
  • Width (maximum): 69.85 mm
  • Length (maximum): 100.45 mm
  • Model #: MBF245LRC
Seagate Cheetah 15K.4 ST336754LW 36.7GB 15000 RPM 8MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
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Seagate Cheetah 15K.4 ST336754LW 36.7GB 15000 RPM 8MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
  • Average Seek Time: 3.5ms
  • Average Write Time: 4.0ms
  • Average Latency: 2ms
  • Parts: 5 years limited
  • Model #: ST336754LW
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
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
Dell 342-2056 600GB 15000 RPM 16MB Cache SAS 3Gb/s 3.5" Internal Hard Drive Bare Drive
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DELL
Dell 342-2056 600GB 15000 RPM 16MB Cache SAS 3Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 12Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 342-2056
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
Seagate EXOS X24 20TB SATA 6Gb/s ISE 3.5inch Hard drive - ST20000NM002H
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  • $744.99 - $755.99
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HPE - SERVER OPTIONS 861691-B21 1TB SATA 6G 7200 RPM 3.5IN LFF
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HP 581286-B21 600GB 10000 RPM SAS 6Gb/s 2.5" Enterprise Hard Drive
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HP 581286-B21 600GB 10000 RPM SAS 6Gb/s 2.5" Enterprise Hard Drive
  • Height (maximum): 9.5mm
  • Width (maximum): 69.75mm
  • Length (maximum): 100.3mm
  • Parts: 3 year limited
  • Model #: 581286-B21
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
  •  
  • $75.00 
  • Free Shipping
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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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Dell 55RMX 500GB 7200 RPM SAS 6Gb/s 2.5" Internal Hard Drive Bare Drive
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DELL
Dell 55RMX 500GB 7200 RPM SAS 6Gb/s 2.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 55RMX

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