USB flash drives are pretty self-explanatory ... ports are usually located on the rear side and have a blue inner strip ...

Emerging just before the turn of the century, the USB drive comprises one or more flash memory chips that store up to two terabytes (2TB) of data. Initially holding only eight megabytes ...

Never flash a USB drive again to install Windows or Linux, just use Ventoy. It's so easy, why didn't I know about it before ...