USB (Universal Serial Bus) is a data transfer standard adopted by the entire technology industry. It came about in 1996 and today it is almost ubiquitous. But some specifications are a little hard to understand.
Whoever is going to buy a PC, cable or storage unit (a pen drive, an external HD, something like that) often comes across such specs as USB 2.0 or 3.0. It also has USB Type-C and USB Type-A. Not to mention Micro USB and Mini USB.
After all, what do all these suffixes and prefixes mean? How do I know if I am buying the product with the right connector for my cables, notebook and cell phone?
Letters and numbers
First of all, we need to understand the difference between a standard or USB generation and a USB connector format. The difference between these two is what determines the number or letter that accompanies the USB in the packaging of the product you are wanting to buy.
The USB standard is determined by the number: 1.0, 2.0, 3.0, and so on. The oldest one is USB 1.0, created in 1996. The most recent is USB 3.2, recently announced by the USB Implementers Forum (USB-IF), the body responsible for setting the standards for this technology.