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LENOVO 00WG661 00WG660 00WG664 300GB 15K RPM 12Gbps G3HS 2.5" SAS HDD Hard Drive
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00NA232 00NA231 00NA235 LENOVO 600GB 15K RPM 12Gb/s 2.5" SAS HDD Hard Drive
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IBM 49Y1875 - 2TB 3.5" Near Line SAS 7.2K 6Gb/s HS Hard Drive
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  • $95.19 
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748794-002 XP0064GDZMF HP 64GB 6G SATA 2242 MLC M.2 SSD-ADA HARD DRIVE
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  • $99.89 
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EG0600FCVBK 581286-B21 693569-003 HPE 600GB 10K 6Gb/s 2.5" SFF SC SAS Hard Drive
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  • $69.88 
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HTS721010A9E630 HGST 7K1000 1TB 7200RPM 6Gbps 2.5" SATA Laptop HDD Hard Drive
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HTS725032A7E630 HITACHI 0J33233 320GB 7200RPM 3Gbps 2.5" SATA HDD Hard Drive
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  • $38.88 
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HPE 693721-001 4 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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  • $114.00 
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IBM 00AJ301 00AJ300 00AJ304 600GB 15K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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32P0731 32P0728 24P3714 IBM 146.8GB 10K U320 8MB 80-Pin SCSI 3.5" Hard Drive.
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Western Digital Ultrastar DC HC560 0F38785 20 TB Hard Drive 3.5" Internal SATA
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  • $936.18 - $945.64
Dell 394XT SATA 2.5 Inch Solid State Drive - 120 GB - 6 Gbps
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  • $175.00 
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49Y1840 49Y1836 49Y1839 IBM 300GB 10000RPM 6Gbps 2.5" SAS SERVER HDD Hard Drive
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HGST Travelstar Z7K500 HTS725050A7E630 500GB 2.5" SATA III Laptop Hard Drive
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HP 718292-001 718162-B21 1.2TB 10000RPM 6Gbps 2.5" SAS SERVER HDD Hard Drive
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HPE 689287-003 EG0600FCSPL 600 GB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
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  • $154.00 
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00NA252 00NA251 00NA255 IBM 900GB 10000RPM 12Gbps G3HS 2.5" SAS HDD Hard Drive
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HPE 695842-001 4 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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  • $149.10 
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787647-001 1FE200-035 HP MSA 900GB 10K RPM 12Gb/s 2.5" SAS SERVER HDD Hard Drive
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  • $228.88 
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HP 684594-001 1 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
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  • $107.19 
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HP 649401-003 2Tb 7200Rpm 3.5Inch Midline Sata 3Gb By S Hard Disk Drive With Tray
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  • $149.19 
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HPE 605475-001 2 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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  • $71.19 
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WD10JPVT-08A1YT2 - Lenovo 1TB Hard Drive (5400RPM/ 9.5MM) for Lenovo
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  • $56.80 
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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:

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