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ST4000NM0033 Seagate CONSTELLATION 4TB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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4VMHH DELL 1.2TB 10K SAS 2.5" 12Gb HDD KIT FOR R640 R740 R740XD R940 C6420
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  • $150.00 
LOT OF 10-Dell EXOS G2G54 ST1200MM0099 1.2TB 10KRPM 12Gbps 2.5"SAS HDD HardDrive
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  • $775.00 
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432341-B21 HP 750GB SATA 7.2K 3.5-inch 1.5G Hard Drive 432401-001 397377-009
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Refurbished 432341-B21 HP 750GB SATA 7.2K 3.5-inch 1.5G Hard Drive 432401-001 397377-009
  • Average Seek Time: 11ms
  • Part Number: 432341-B21
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: 432341-B21
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  • $26.00 
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Seagate Constellation ES.2 ST32000646NS 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Refurbished Seagate Constellation ES.2 ST32000646NS 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 9.5ms
  • Average Latency: 4.16ms
  • Windows Vista: Works with Windows Vista
  • Model #: ST32000646NS
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  • $65.00 
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U795J Dell EqualLogic 500GB 7200RPM 3.5" SATA Hard Drive - In PS100E PS200E PS300E PS400E Tray
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  • $39.99 
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Dell MY58D // HUS724030ALS640 SAS 3TB 7.2K 3.5" HDD
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862138-001 HP G8-G10 6-TB 6G 7.2K 3.5 SATA 512e Hard Drive
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HGST Ultrastar A7K2000 HUA722010CLA330 (0A39289) 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
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HGST Ultrastar A7K2000 HUA722010CLA330 (0A39289) 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Height (maximum): 25.4mm
  • Parts: 2 yrs
  • Labor: 2 yrs
  • Model #: 0A39289
ST6000NM0034 6TB 7.2K 12G 3.5" SAS HDD for Dell T300 T310 T320 T330 T410
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Western Digital Ultrastar DC HC320 0B36404 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Western Digital
Western Digital Ultrastar DC HC320 0B36404 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: 0B36404
  • $444.45
  •  
  • $394.45 
  • Save: 11%
WD10EURX Western Digital 1TB 5400RPM 6Gbps 3.5" SATA HDD Hard Drive
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  • $98.95 
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J770N ST9500530NS Dell 500GB 7200RPM 3Gbps 2.5"SATA SERVERHDD Hard Drive W/RTray
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J164R WD2002FYPS Dell ENTERPRISE 2TB 5400RPM 3Gbps 3.5"SATA SERVER HDD HardDrive
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HP EG1200FDJYT Msa 1.2Tb 10000Rpm Sas 6Gbits Sff 2.5Inch Dual Port Enterprise Hard Drive With Tray
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  • $85.00 
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VYRKH DELL 2TB 7.2K SAS 3.5 HDD 6Gbps
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DELL
VYRKH DELL 2TB 7.2K SAS 3.5 HDD 6Gbps
  • Model #: 132-469161000262159
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Dell 463-4953 4 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
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  • $124.95 
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GY6RN DELL 1.8TB 10K SAS 2.5" 12Gb/s HDD KIT FOR T330, T430, T530, T630, R330
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  • $200.00 
SSDSC2BX800G4 Intel DC S3610 Series 800GB 2.5 inch SATA SSD
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  • $99.99 
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WD Purple 6TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch WD63PURZ
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WD Purple 6TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch WD63PURZ
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD63PURZ
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WD Gold 10TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD102KRYZ
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WD Gold 10TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD102KRYZ
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD102KRYZ
DELL ENTERPRISE ACCESSORIES 400-ATJL 2GBPS 2.5IN 512N 10K RPM SAS
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DELL
DELL ENTERPRISE ACCESSORIES 400-ATJL 2GBPS 2.5IN 512N 10K RPM SAS
  • NAND Flash Memory Type: SLC
  • Average Latency: 6Gb/s
  • Usage: For Enterprise Storage
  • Model #: F5HFM
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36RH9 ST1200MM0088 Dell ENTERPRISE 1.2TB 10000RPM 6Gbps 2.5" SAS HDD Hard Drive
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  • $55.00 
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Seagate ST8000NM0075 ST8000NM0075 8 TB Hard Drive - 3.5" Internal - SAS (12Gb/s SAS)
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Seagate
Refurbished Seagate ST8000NM0075 ST8000NM0075 8 TB Hard Drive - 3.5" Internal - SAS (12Gb/s SAS)
  • NAND Flash Memory Type: SLC
  • Usage: For Enterprise Storage
  • Model #: ST8000NM0075
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  • $225.00 
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HUH721212ALE600 12TB SATA 7.2K 6Gb/s 3.5" Hard Drive Dell T2YHT
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  • $425.00 
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WD RE WD5003ABYZ 500GB 3.5" SATA Internal Hard Drive
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Western Digital
WD RE WD5003ABYZ 500GB 3.5" SATA Internal Hard Drive
  • NAND Flash Memory Type: Others
  • Model #: 718037805467

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