Hard drives come in all shapes and sizes and their are many companies that produce them. The amount of information a drive can fit has been increasing at an extremely alarming rate only a few years ago a terabyte was a big deal now it is almost normal to have close to or more than a terabyte of hard drive space.
Well known storage copanies:
- Western Digital
These are the major brands while these are the ones you will likely see the most their are dozens of manufacturers. Full list of hard drive manufacturers.
Hard drives are not all the same some run at different speeds, and some are different form factors while others are custom or portable such as “Flash” or “Thumb” drives.
Hard drives are traditionally mechanical having a magnetic disc inside it with a write-read head. Though in recent years SSD (Solid State Drive) have hit the consumer market though they are not very economical in terms of how much you pay for what amount you get but prices are improving.
The advantages of a Solid State Hard Drive is that is has no mechanical moving parts so it is less prone to failure and can reach exceptionally high speeds. Most hard drives are rated to last 3-5 years while an SSD can go for 4-10 years. At the time of writing this a terabyte SSD will run you around $500~$1500 depending on the brand and interface methods such as USB 2.0 / 3.0 or Thunderbolt.
Internals of an SSD