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1.2TB Dell 10K RPM SAS 12GB/s 2.5" Hot Swap HDD For R640 R740 R740XD R940 C6420 MD1400 MD1420
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DELL
1.2TB Dell 10K RPM SAS 12GB/s 2.5" Hot Swap HDD For R640 R740 R740XD R940 C6420 MD1400 MD1420
  • NAND Flash Memory Type: SLC
  • Average Latency: 12Gb/s
  • Model #: G2G54
HITACHI DESKSTAR 7K1000 500GB 7200RPM 16MB CACHE 3.5 INCH SATA HARD DRIVE HDT721050SLA360
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  • $59.19 
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Hitachi Hard Drive 600GB 15K 3.5"FC w/o Carrier HUS156060VLF400
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Hitachi Hard Drive 600GB 15K 3.5"FC w/o Carrier HUS156060VLF400
  • NAND Flash Memory Type: SAN Hard Drive
  • Height (maximum): 25.4mm
  • Width (maximum): 101.35mm
  • Length (maximum): 147mm
  • Model #: HUS156060VLF400
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  • $42.19 
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400-ALDU 6TB 7200RPM SAS 3.5Inch Dell Hard Drive
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  • $399.00 
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Seagate Cheetah 10K.7 ST3300007LC 300GB 10000 RPM 8MB Cache SCSI Ultra320 80pin 3.5" Hard Drive Bare Drive
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  • $899.95 
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WL 2TB (2 Terabyte) 64MB Cache 7200RPM SATA 3.0Gb/s Internal 3.5" Hard Drive (Enterprise Grade) - w/ 1 Year Warranty
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WL 2TB (2 Terabyte) 64MB Cache 7200RPM SATA 3.0Gb/s Internal 3.5" Hard Drive (Enterprise Grade) - w/ 1 Year Warranty
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: WL2000GSA6472E
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  • $57.99 
  • Free Shipping
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Seagate SkyHawk AI ST20000VE002 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate SkyHawk AI ST20000VE002 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST20000VE002
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Seagate IronWolf ST12000VN0008 12 TB Hard Drive - 3.5" Internal - SATA (SATA/600) (ST12000VN0008) -  OEM Pack, International Version  No Warranty
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WD3000HLHX Western Digital 637004-001 300GB 10KRPM 6Gb/s 3.5"SATA HDD Hard Drive
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  • $54.00 
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ST9146853SS Dell SAVVIO 15K.3 146GB 15K RPM 6Gbps 2.5" SAS Hard Drive W/R Tray
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  • $35.88 
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0B28470 Dell 1.2TB 10K SAS 6G SFF Hard Drive
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IBM 98Y6215 - IBM 6TB 3.5" SAS 7.2K 12Gb/s Solid State Drive
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  • $200.00 
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ST2000NM0001-DELL 2TB 7200RPM 6GBPS 2.5-INCH SAS LFF HARD DRIVE
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  • $39.99 
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Avolusion PRO-5X Series 6TB USB 3.0 External Gaming Hard Drive for PS5 Game Console (White) - 2 Year Warranty
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  • $169.99 
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Seagate Exos 7E10 6TB 3.5" SATA 7200rpm Internal Hard Drive ST6000NM019B
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Seagate
Seagate Exos 7E10 6TB 3.5" SATA 7200rpm Internal Hard Drive ST6000NM019B
  • NAND Flash Memory Type: SLC
  • Parts: 5 Year
  • Model #: ST6000NM019B
HP 606020-001 1TB 7200 RPM SAS 6Gb/s 2.5" Internal Hard Drive Bare Drive
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HP
HP 606020-001 1TB 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 #: 606020-001
ST500DM009 Seagate 2F110A 500GB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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Seagate
ST500DM009 Seagate 2F110A 500GB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
  • Model #: ST500DM009-2F110A-seagate-new-drive-ATP
ST9300653SS Seagate 9SW066 300GB 15KRPM 6Gbps 2.5" SAS HDD Hard Drive W/0 HOURS
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  • $46.00 
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WD Red 5TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD50EFRX
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Used - Like New WD Red 5TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD50EFRX
  • Height (maximum): 26.1mm
  • Width (maximum): 101.6mm
  • Length (maximum): 147.00mm
  • Model #: WD50EFRX
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  • $225.00 
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Dell FVX7C - Dell 2TB 2.5" Nearline SAS 7.2K 12Gb/s Hard Drive
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DELL
Dell FVX7C - Dell 2TB 2.5" Nearline SAS 7.2K 12Gb/s Hard Drive
  • Average Latency: 12Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: FVX7C

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