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Seagate BarraCuda 7200.10 ST3250310AS 250GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda 7200.10 ST3250310AS 250GB 7200 RPM 8MB 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
  • NAND Flash Memory Type: Desktop
  • Model #: ST3250310AS
9W5WV ST91000640SS Dell 1TB 7.2K RPM 6Gb/s 2.5"SAS SERVER HDD Hard Drive W/Caddy
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  • $41.00 
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ST8000AS0002 Seagate Archive 8TB 5.9K RPM SAS 6Gbps 3.5" 128MB HDD NEW BULK
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Seagate
ST8000AS0002 Seagate Archive 8TB 5.9K RPM SAS 6Gbps 3.5" 128MB HDD NEW BULK
  • Part Number: ST8000AS0002
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: ST8000AS0002-NEW
0-HOURS WD1002FBYS Western Digital 1TB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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  • $72.00 
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0-HOURS Dell GEN14 RWR8F ST2400MM0159 2.4TB 10K RPM 12Gb/s 2.5" SAS Hard Drive
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  • $650.00 
  • Free Shipping
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Seagate Exos X16 12TB 7200 RPM SAS 12Gb/s 3.5" Hard Drive ST12000NM002G
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Seagate
Refurbished Seagate Exos X16 12TB 7200 RPM SAS 12Gb/s 3.5" Hard Drive ST12000NM002G
  • Part Number: ST12000NM002G
  • NAND Flash Memory Type: Hard Drive
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: ST12000NM002G
Seagate BarraCuda 7200.10 ST3250620AS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive
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Seagate BarraCuda 7200.10 ST3250620AS 250GB 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 #: ST3250620AS
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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Dell 0W347K W347K 600GB 15K 6Gbps 3.5" SAS HARD DRIVE ST3600057SS
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DELL
Dell 0W347K W347K 600GB 15K 6Gbps 3.5" SAS HARD DRIVE ST3600057SS
  • Parts: 30 days warranty
  • Labor: 30 days warranty
  • Model #: ST3600057SS
1VE100-136 Dell 1TB 7.2K SATA 6G SFF Server Hard Drive
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Seagate Desktop HDD ST4000DM000 4TB 5900 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive
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Seagate Desktop HDD ST4000DM000 4TB 5900 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive
  • NAND Flash Memory Type: Desktop
  • Height (maximum): 26.11mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Model #: ST4000DM000
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Seagate 2TB Enterprise Capacity 2.5" 7200RPM SAS 12Gb/s 128MB Cache Internal Hard Disk Drive Model ST2000NX0263
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Seagate
Seagate 2TB Enterprise Capacity 2.5" 7200RPM SAS 12Gb/s 128MB Cache Internal Hard Disk Drive Model ST2000NX0263
  • Average Latency: 4.16ms
  • Height (maximum): 15mm
  • Width (maximum): 70.10mm
  • Length (maximum): 100.46mm
  • Model #: ST2000NX0263
Western Digital IU HA570 WD240EDGZ 24TB 7.2K RPM SATA 6Gb/s 512e 512MB 3.5in Recertified HDD
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Western Digital
Refurbished Western Digital IU HA570 WD240EDGZ 24TB 7.2K RPM SATA 6Gb/s 512e 512MB 3.5in Recertified HDD
  • Brand: Western Digital
  • Series: IU HA570
  • Model: WD240EDGZ
  • Capacity: 24TB
  • Model #: WD240EDGZ
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  • $559.00 
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9ZM175-136 Dell 2TB 7.2K SATA 6G LFF Hard Drive
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Dell 1DKVF 146GB Seagate ST3300657SS-H 3.5"SAS 6Gb/s 15K Hard Drive
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  • $239.95 
HP/HGST Ultrastar He10 HUH721010AL5204 0F27373 10TB 7.2K RPM SAS 12Gb/s 512e 256MB 3.5in Refurbished HDD
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Refurbished HP/HGST Ultrastar He10 HUH721010AL5204 0F27373 10TB 7.2K RPM SAS 12Gb/s 512e 256MB 3.5in Refurbished HDD
  • Brand: HP/HGST
  • Series: Ultrastar He10
  • Capacity: 10TB
  • RPM: 7.2
  • Model #: HUH721010AL5204-0F27373
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  • $259.00 
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HGST HUH721008ALN600 - HGST 8TB 3.5" SATA 7.2K 6Gb/s Solid State Drive
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  • $250.00 
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746843-001 900GB 10000RPM SAS 2.5Inch HP Hard Drive
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HP
Refurbished 746843-001 900GB 10000RPM SAS 2.5Inch HP Hard Drive
  • NAND Flash Memory Type: SLC
  • Model #: 746843-001
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  • $21.00 
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WD WD4001FYYG RE WD4001FYYG 4 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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  • $94.10 
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TOSHIBA MKxx02TSKB Series MK2002TSKB 2TB 7200 RPM 64MB Cache SATA 3.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
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TOSHIBA MKxx02TSKB Series MK2002TSKB 2TB 7200 RPM 64MB Cache SATA 3.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
  • Average Seek Time: 9.5ms
  • Average Latency: 4.17ms
  • Height (maximum): 26.1mm
  • Width (maximum): 101.6mm
  • Model #: MK2002TSKB

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