File sharing is the public or private sharing of files between people using a computer connected to the internet. There is a lot of debate whether file sharing is legal or illegal, I believe that file sharing is ok, however it depens on the content of the file that you are sharing. In most countries file sharing is legal, however if the content is protected by copyrights then to share to other users is illegal. For example downloading or sharing a copyrighted movie, sharing copyrighted songs, or downloading songs that you have purchased is all illegal.
What happens if I get caught?
It depends on the law of the country you live in, however usually you would be fined for each item. That’s every song, movie or software you’ve downloaded or shared.