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X829K ST9146803SS Dell 146GB 10K RPM 6Gb/s 2.5"SAS SERVER HDD Hard Drive W/Caddy
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DELL Hy281  80Gb 7200Rpm Sata 8Mb Buffer 3.5Inch Hard Disk Drive
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ST9300653SS Seagate 9SW066-046 300GB 15000RPM 6Gbps 2.5" SAS HDD Hard Drive
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Dell D3YV6 1 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
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WD2500AAKX Western Digital M4HXR 250GB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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WD RE WD1003FBYX 1 TB 3.5" Internal Hard Drive
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HT953 0HT953 DELL ST3300655SS 300GB 15K RPM 3Gb/s 3.5" SAS SERVER HDD Hard Drive
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0F19455 HUS724030ALA640 HGST 3TB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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HTS543225L9A300 Hitachi TRAVELSTAR 250GB 5.4K RPM 3Gb/s 2.5" SATA HDD Hard Drive
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WD WD1600AAJS 160GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive
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17P9205 300GB 10000RPM Fibre Channel 3.5Inch IBM Hard Drive
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Seagate 504337-001 519599-002 9SL131-022 250GB 7200RPM SATA 3GB/S 8MB CACHE 3.5
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H8DVC ST9300653SS Dell POWEREDGE 300GB 15K RPM 6Gb/s 2.5" SAS SERVER Hard Drive
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2RR9T ST900MM0006 Dell 900GB 10K 6Gb/s 64MB Cache 2.5" SAS Hard Drive W/Caddy
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0CM318 CM318 Dell ST9146802SS 146GB 10K RPM 3Gbps 2.5" SAS SERVER HDD Hard Drive
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Dell P252M 0P252M 300GB 10K 6G 16MB 2.5" SAS Hard Drive HUC103030CSS600
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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:

Casey H.
7/21/2025 4:10:23 PM
My "Go To" for HDs

“ These are my "go to" drives for not only internal system drives, but also offloading external storage; using a 4 Bay USB 3.x Drive Cage. ”

Seagate BarraCuda ST4000DM004 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive - OEM