Last weekend i reformatted the whole drive and reinstalled windows. Didnt even had to create backups, as all my stuff that its worth something its on different servers on the “cloud”, i have stuffs in bitbucket, private git, google drive, and dropbox. That way i dont lose a single line of code i dont want to lose, and i still keep all the code ive done last few years. You should use version control and create different backups on several places, so you wont have a problem (i know one of the cloud stuff can explode, but i already have it on the PC, so i can just upload it somewhere else)