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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
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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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0_HOURS WD5003ABYX Western Digital 500GB 7200RPM 3Gbps 3.5" SATA Hard Drive
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  • $52.88 
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Seagate BarraCuda 7200.7 ST3200822AS 200GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.7 ST3200822AS 200GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3200822AS
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  • $90.00 
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Seagate Cheetah 15K.6 ST3146356SS 146GB 15000 RPM 16MB Cache SAS 3Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate
Seagate Cheetah 15K.6 ST3146356SS 146GB 15000 RPM 16MB Cache SAS 3Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 3.4ms
  • Average Write Time: 3.9ms
  • Average Latency: 2ms
  • Parts: 30 DAYS WARRANTY
  • Model #: ST3146356SS
  • $113.00
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  • $64.00 
  • Save: 43%
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Seagate Cheetah 15K.3 ST336753LC 36.7GB 15000 RPM 8MB Cache SCSI Ultra320 80pin 3.5" Hard Drive Bare Drive
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Seagate
Seagate Cheetah 15K.3 ST336753LC 36.7GB 15000 RPM 8MB Cache SCSI Ultra320 80pin 3.5" Hard Drive Bare Drive
  • Average Seek Time: 3.6ms
  • Average Write Time: 4.0ms
  • Average Latency: 2ms
  • Parts: 5 years limited
  • Model #: ST336753LC
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  • $145.00 
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Western Digital WD2500BEKT Y19R3 250GB 7.2K 3G 16MB 2.5in SATA Hard Drive
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  • $45.88 
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WD4001ABYS Western Digital RE2 400GB 7200RPM 3Gbps 3.5" SATA HDD Hard Drive
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  • $39.88 
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HPE 626162-001 MM1000EBKAF 1 TB Hard Drive - 2.5" Internal - SATA (SATA/300)
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HP
HPE 626162-001 MM1000EBKAF 1 TB Hard Drive - 2.5" Internal - SATA (SATA/300)
  • NAND Flash Memory Type: SLC
  • Usage: Ideal for Servers
  • Model #: 626162-001
  • $331.96
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  • $124.19 
  • Save: 62%
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Seagate BarraCuda 7200.8 ST3400832AS 400GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.8 ST3400832AS 400GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" Hard Drive Bare Drive
  • Average Seek Time: 11ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3400832AS
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  • $69.00 
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Seagate BarraCuda ES ST3400620NS 400GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda ES ST3400620NS 400GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Desktop
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3400620NS
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  • $74.00 
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WD800BEVT Western Digital PW059 BLUE 80GB 5400RPM 3Gbps 2.5" SATA HDD Hard Drive
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  • $45.91 
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WD6000BLHX Western Digital VelociRaptor 600GB 10K 6G 32MB 2.5" SATA Hard Drive
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  • $106.88 
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Seagate BarraCuda ES ST3750641NS 750GB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate
Seagate BarraCuda ES ST3750641NS 750GB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST3750641NS
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  • $80.19 
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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
Seagate SV35.3 ST3500320SV 500GB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate SV35.3 ST3500320SV 500GB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST3500320SV
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  • $69.19 
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Seagate BarraCuda 7200.8 ST3400832A 400GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.8 ST3400832A 400GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3400832A
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  • $100.00 
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Seagate BarraCuda 7200.7 ST3120827AS 120GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.7 ST3120827AS 120GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3120827AS
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  • $129.00 
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Seagate Barracuda 7200.7 Plus ST3120026A 120GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate Barracuda 7200.7 Plus ST3120026A 120GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 11.5ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3120026A
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  • $185.10 
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Seagate Pipeline HD ST3160316CS 160GB 5900 RPM 8MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  • $45.19 
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Seagate BarraCuda 7200.9 ST3160811AS 160GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3160811AS 160GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3160811AS
Seagate Barracuda 7200.10 ST3300620A 300GB 7200 RPM 16MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate
Seagate Barracuda 7200.10 ST3300620A 300GB 7200 RPM 16MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST3300620A
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  • $120.00 
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Seagate BarraCuda 7200.8 ST3250823A 250GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.8 ST3250823A 250GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3250823A
Seagate BarraCuda 7200.9 ST380811AS 80GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST380811AS 80GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST380811AS
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  • $58.00 
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Seagate Cheetah 10K.6 ST3146807LC 147GB 10000 RPM 8MB Cache SCSI Ultra320 80pin 3.5" Hard Drive Bare Drive
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Seagate
Seagate Cheetah 10K.6 ST3146807LC 147GB 10000 RPM 8MB Cache SCSI Ultra320 80pin 3.5" Hard Drive Bare Drive
  • Average Seek Time: 4.7ms
  • Average Write Time: 5.3ms
  • Average Latency: 2.99ms
  • Parts: 5 years limited
  • Model #: ST3146807LC
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  • $140.19 
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WD20NPVX Western Digital GREEN 2TB 5.4K RPM 6Gb/s 2.5" SATA HDD Hard Drive
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  • $198.88 
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HP 512743-001 72GB 15000 RPM SAS 6Gb/s 2.5" Internal Hard Drive
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HP
HP 512743-001 72GB 15000 RPM SAS 6Gb/s 2.5" Internal Hard Drive
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 512743-001
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  • $48.19 
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WD20EADS Western Digital GREEN 2TB 5.4K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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  • $190.00 
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Seagate BarraCuda 7200.8 ST3200826AS 200GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.8 ST3200826AS 200GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" Hard Drive Bare Drive
  • Average Seek Time: 11ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3200826AS
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  • $99.00 
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Seagate BarraCuda ES ST3250820NS 250GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda ES ST3250820NS 250GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3250820NS
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  • $50.00 
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Seagate Cheetah 15K.4 ST3146854SS 147GB 15000 RPM 8MB Cache Serial Attached SCSI (SAS) 3.5" Hard Drive Bare Drive
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Seagate
Seagate Cheetah 15K.4 ST3146854SS 147GB 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 #: ST3146854SS
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  • $109.00 
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Seagate SV35.3 ST31000340SV 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate SV35.3 ST31000340SV 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 #: ST31000340SV
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  • $110.19 
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Western Digital WD Green WD15EADS 1.5TB 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  • $48.10 
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Seagate BarraCuda ES.2 ST3500320NS 500GB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda ES.2 ST3500320NS 500GB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Model #: ST3500320NS
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  • $200.19 
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DELL 00Y 500Gb 7200Rpm Sata6Gbps 2.5Inch Low Profile Hard Disk Drive
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DELL
DELL 00Y 500Gb 7200Rpm Sata6Gbps 2.5Inch Low Profile Hard Disk Drive
  • NAND Flash Memory Type: SLC
  • Usage: Ideal for Servers
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 00X3Y
HP 655708-B21 7200 RPM SATA 6.0Gb/s 2.5" Internal Notebook Hard Drive
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HP
HP 655708-B21 7200 RPM SATA 6.0Gb/s 2.5" Internal Notebook Hard Drive
  • Height (maximum): 15.75mm
  • Width (maximum): 75.7mm
  • Length (maximum): 118.62mm
  • Parts: 1 Year
  • Model #: 655708-B21
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  • $161.56 
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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:

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