Good day! I am new to the forum and so far have learnt a few things about my Mac. I have a problem tho. For the last few days, my MacBook had been giving me warning about the startup disc being full. Since then, I have taken steps to free up some space by deleting files and creating archives. However, today, when I switched on my Mac today, nothing came on except a picture of a folder and a "?" on it. My question is, what can I do to start/restart my Mac and is there anything else I can do to free up my Startup disc. Thank you for any assistance.