how can i stop league from taking all my storage? >:(((

so, i have a personal pc pacifically for league. the only tings downloaded on it are league of legends and google chrome, but i rarely use google chrome. whenever there's a patch update, i update and play for the entire day. for the rest of the week, i don't play at all and i dont even open up the pc. by the next week, when i want to play again, it has another patch update. but then it tells me i dont have enough storage for the update >:-(( so then i can't play. so then i jus reset my pc by fully cleaning the drive and install google chrome and league again. it has become a weekly ting now, and im jus tryna play league >:-((((( my pc has 21.5 GB. does anyjuan know da wae to prevent league from absorbing all my storage. im very mad >:-(((((((( pls tell me, thank u