Hello everyone 
Right now im new to this making game thing and i want to know before i start, how do i save my project, in case my computer dont work anymore and i need a new one.
It will be very annoying to be close to finish and game and then you computer stop working. So i do you save it so you can continue, when you get a new pc.
Thanks alot for answer.
You have to quit unity to save everything.
I think you’re talking about something called “version control.” Services like Github are great for this–although you do have to have a paid account in order to make your repository private. If you’re a student you can apply for a student pack which will give you, among other things, an upgraded Github account for free. You can check that out here: Sign in to GitHub · GitHub
Aside from that, you could put a backup copy of your project folder in something like Dropbox or Google Drive. I wouldn’t recommend you set your actual project folder to be synced, as I’ve heard a couple of horror stories involving that.
And of course local backups are also good. Keep a dedicated thumb drive or external HD and make it a habit to copy your project folder to it every day/week/revision. Keep several copies going so you can go back to an earlier state if need be.