download world option on HP chromebook

Hey I am a HP chromebook player for 3 years I am a person who easily forgets passwords and I restarted my laptop on multiple occasions and once I lost everything all my worlds I had to restart multiple times it made me very upset then i am in the same predicament right now and i don't want to lose my beautiful world it took me a year to build after all this time I forgot my password mojang should have it where you can cross save with your profile or at least download worlds you want to keep on hp chromebooks thank you for reading and I hope more hp chromebook players agree