Internal Hard Drives


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FAQ (Frequently Asked Questions) About Internal Hard Drives

Running out of space on your computer? Building a PC from scratch? These are just some of the reasons why you might need an internal hard drive. Find out the answers to some of the most frequently asked questions about internal hard drives.

What is an internal hard drive?

An internal hard drive is the primary storage unit inside your computer. Found in desktops and laptops, it's the place where the computer's operating system, applications, and files are contained. It can offer quick and easy access to your professional documents, 80s music playlist, or favourite rom-com without the need to plug in an external drive.

What types of internal hard drives are there?

When it comes to computers, there are 2 types of internal hard drives: laptop and desktop. Laptop internal hard drives are generally 2.5" in size, while desktop internal hard drives are usually 3.5".

What features should I consider when buying an internal hard drive?


Internal hard drives range in capacity from 120GB to 4TB, with desktop hard drives offering a higher maximum capacity. When considering capacity, think about how much you plan to store in your computer and whether that will change in the future. If you have thousands of vacation photos, a huge movie collection, and an ever-growing music compilation, a larger-capacity hard drive of 1TB or more would be ideal. If you mainly store documents, photos, and occasional media files, a 500GB or 1TB internal hard drive may suffice. Some desktop PCs have more than 1 hard drive bay, allowing you to install another internal hard drive if the first one fills up.

Drive size

The drive size or form factor determines whether the hard drive will fit in your computer. Laptops fit 2.5" internal hard drives while desktops fit 3.5" drives. Barebones or mini PCs generally have space for a 2.5" internal hard drive.


Modern internal hard drives feature a Serial ATA (SATA) interface, while older models may have a Parallel ATA (PATA) interface. When choosing an internal hard drive, ensure your computer supports the drive's interface. If you have an older computer with a PATA connection, you'll need to install a SATA PCI card to accommodate a SATA hard drive.


Hard drive speed, measured in revolutions per minute (rpm), determines how quickly the hard drive accesses your stored data. Most hard drives range in speed from 5400rpm to 7200rpm, while some run as high as 10,000rpm. For everyday storage and applications, a 7,200rpm hard drive will offer quick access to your files. A 10,000rpm hard drive is suitable for servers and workstations, where data needs to be constantly accessed.

Data buffer

Data buffer, or cache, is the amount of memory available for short-term information storage. Like RAM, it's where data is temporarily stored when moved between the hard drive and computer. Ranging in size from 8MB to 128MB, data buffer can affect how the hard drive transfers information to the computer. If you're a hard-core gamer or creative professional who needs constant access to multiple files, opt for a higher data buffer of 64MB or more. If you're a casual computer user, data buffer between 8 and 32GB should be sufficient.

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