A while ago, I started getting messages that my computer was running out of memory. I put off doing anything about it -- cleaning up a decade's worth of files did not sound like a fun task. But eventually I took a look, sorted files by size, and came to a lovely discovery. There were a few large files -- some video attachment to an email someone sent me three years ago, stuff like that. After I deleted 10 or 20 of these, all of a sudden there was lots of space! The rest of my computer remains a Marie Kondo nightmare.