What is a hard drive, and its purpose?

The hard drive is the module that stores your information. You’ll frequently see the term “hard drive” abbreviated to “HDD.” There are numerous motives you might want to buy one: You are out of space on your current HDD and need a bigger one. You are noticing that it takes a long time to open documents or export large files like videos. You are building a new PC from scratch. Whatsoever the condition, understanding why you want or need a fresh drive will help you know what you want and requirement. Once you’ve got that figured out, it’s time to know more about the different types of hard drives and the trade-offs among them.

SSD stands for Solid State Drive. These disks don’t have any moving parts. Instead, all of the information is stowed on non-volatile flash memory. That means that there isn’t a pointer that has to move to read or write data and that they are significantly faster than SATA drives. It’s difficult to find an exact speed because it varies by manufacturer and form factor, but even the lower-performing drives are comparable to SATA drives. The downside is that these drives are significantly more luxurious and don’t come in as numerous sizes. SSD drives variety from about 120 GB to 2 TB, and are about 2-4 times the price of a SATA hard drive of the equal size. Since there are no moving parts, these drives are also a lot more durable, and there are form factors built specifically for laptops, making them ideal for storage on the go.

Pros: Fast, More durable, especially for laptops

Cons: More expensive than SATA drives, Lower disk sizes


SATA stands for Serial Advanced Technology Attachment is the default interface for most desktop and laptop hard drives but they are actually rotary hard drives with spinning platters and a moving pointer that inscribes data to consecutive sectors on each plate. SATA hard drives are incredibly fast compared to their predecessor, the PATA hard drive, and can write to the disk with an interface rate of 6 Gb/s with a throughput of 600 MB/s. A single drive can range from 500 GB to 16 TB and are available at a lower cost than any of the other drive types discussed here.

Pros: Low cost, High disk sizes

Cons: Not good for laptops, Requires regular de-fragmentation



NVMe stands for Non-Volatile Memory Express is a type of SSD that’s attached to a PCI Express (PCIe) slot on a core board. These slots were initially intended for graphics cards, so they are extremely fast. Speeds on NVMe drives can reach an interface rate of 32 Gb/s with a throughput of 3.9 GB/s. That can be very useful if you are doing something that needs a lot of diskthroughput, like gaming or high-resolution video editing.

Pros: Fastest disk type on the marketplace

Cons: Very expensive


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