Hello All. I am new to this forum. I have a M1 MacBook Air and all of a sudden my hard drive is full and my laptop no longer properly functioning (Outlook etc shutting down because of lack of space). I ran through a whole range of suggested solutions (cleaning Library items, old back ups, 300,000 old emails on server, etc.) but it does not have a big impact. I managed to clean up 100G, but it seems building back up close to max capacity of 500G. I sent it to an Apple guy and he also seems flabbergasted where this data is sitting and why it keeps building up. Does anyone know how to resolve this??