SSD VS HDD : whats better?

The main difference between an SSD vs a hard drive is in how data is stored and accessed. A hard disk drive (HDD) is a traditional storage device that uses mechanical platters and a moving read/write head to access data. A solid state drive (SSD) is a newer, faster type of device that stores data on instantly-accessible memory chips. Until the late 2000s, the world was simpler. When you bought a new hard disk drive or personal computer, your hard disk storage choices were limited to size and perhaps speed (for example: 5,400 or 7,200 rotations per minute). But today, when you buy a new PC you’re confronted with two very different options.In the example above, the laptop on the left comes with a traditional hard disk drive, while the one on the right contains a more modern solid state drive. The basic purpose of an SSD or HDD is the same: These storage devices preserve your memories, music, documents, and programs. But the technology behind them is quite different: HDDs: An enclosure contains a series of platters covered by a ferromagnetic coating. The direction of the magnetization represents the individual bits. Data is read and written by a head (similar to the way vinyl record albums work) that moves extremely fast from one area of the disk to another. Since all of these pieces are “mechanical,” the hard disk is the slowest component of any computer – and the most fragile. SSD: These newer types of disks store information on flash memory, which consists of individual memory cells storing bits that are instantly accessible by the controller. Why are SSDs useful for laptops? SSDs are often used in laptops because they're non-mechanical. Also, solid state drives require less power, which translates into better battery life. While lower-priced laptops still come with traditional hard drives (it’s one way for manufacturers to minimize their costs), most midrange to high-end machines come with an SSD. And while hard disks have moving parts, solid state drives are shock-resistant. If you drop your laptop, chances are that the read/write head of an old-school hard drive is in motion, which could lead to data failure. This doesn’t happen with SSDs. But it isn’t always an either/or choice. In some cases, you find “hybrid” computers. The system partition that contains the operating system, application programs, and the most-used files are installed on an SSD. Other data, such as movies, photos, and documents, are stored on a traditional HDD, which is larger and less expensive. Price differences between HDDs and SSDs The market for flash storage is volatile and varies based on supply and demand. While the price for SSDs has decreased a lot, there is still a significant price difference. A 500 GB HDD costs between $25 and $50 (for faster, higher-end models), whereas a 500 GB SSD costs anywhere from around $60 to $150. Naturally, these prices will change over time. SSD speed vs HDD speed comparison

conclusion If you’re simply looking for a cheap way to store files, then you can still get a great deal with HDDs. They offer lots of terabytes at affordable prices. But for your “primary” drive (your operating system, application programs, and most-used files), you should upgrade to an SSD, because it offers dramatically improved speeds.