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ST6000NM0034 6TB 7.2K 12G 3.5" SAS HDD for Dell T300 T310 T320 T330 T410
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Dell 9Cf26 500Gb 7200Rpm Sata6gbps 3.5Inch 16Mb Buffer Hard Disk Drive
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  • $50.19 
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Dell 4X1DR // WD9001BKHG-18D22V1 900Gb 10K SAS 6Gbps 2.5" HDD
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  • $46.00 
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Seagate ST8000NM0075 1RM212-001 8TB 7.2K RPM 12Gb/s 3.5"SAS HDD Hard Drive-0 HRS
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  • $255.00 
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55RMX ST9500620SS Dell ENT 500GB 7.2K RPM 6Gb/s 2.5" SAS SERVER HDD Hard Drive
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  • $58.88 
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HPE EH000900JWHPP - HPE 900GB 2.5" SAS 15K 12Gb/s Solid State Drive
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  • $530.39 - $540.83
0B34157 Dell 1.2TB 10K SAS 12G SFF Hard Drive
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0VPTJ DELL 1.8TB 10K SAS 6Gbps 2.5 HDD
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DELL
0VPTJ DELL 1.8TB 10K SAS 6Gbps 2.5 HDD
  • Model #: 7a0-503474000263628
HPE MSA 900GB SAS 12G Enterprise 15K SFF 2.5IN M2 P13243-001 (R0Q53A)
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  • $397.00 
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Dell 400-ATKN 4 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
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  • $79.95 
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HGST Travelstar Z7K500 HTS725050A7E630 500GB 2.5" SATA III Laptop Hard Drive
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hpe 872477-b21 872736-001 600gb 12g sas 10k 2.5 sff ent hdd sc ds new factory sealed
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  • $250.00 
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Synology 12 Bay Expansion Unit DX1215 (Diskless)
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  • $747.99 
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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:

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
Anonymous
1/17/2026 7:23:35 PM
Works great if not DOA

“ My NAS is currently on my desk. ”

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX