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Besides rotational speed, size of an HDD’s cache memory which is usually either 8GB or 16MB, also affects performance.Laptop hard drives come in the 2.5-inch form factor and are connected to the rest of the PC systems via the SATA III interface, which replaced SATA II years ago.It enables extremely fast operation of M.2 solid state drives in laptops with NVMe support.

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They are based on rotating magnetic platters and reading heads.

HDDs are the slowest kind of storage in modern PCs.

In this article, we will explain the main differences between four storage types you can find in modern Windows-based laptops and other portable PCs – hard disk drives (HDD), solid state drives (SSD), hybrids (HHDD / SSHD), and e MMC storage.

The article also contains a table of required space by various software and common user document and media files, so you can sum them up and calculate how much space you actually need.

Many of the cheap laptops come with a smaller 500 GB hard drive, while 2 TB size is occasionally used in some more expensive notebooks.