It is easier not to wait until the disk is almost full, but to review the folders where extra files build up the fastest from time to time.
Downloads, temporary files, and old installers left after updates are especially worth checking.
What to focus on
Start with the simplest things: check Downloads, temporary files, and available space. Even a short review can help restore a sense of order and keep the system from feeling overloaded.
This approach helps keep things tidy without long and tiring cleanup sessions.
What to do next
After a short review, it helps to free space, remove unnecessary downloads, and continue to installation if you want to get the system into a cleaner state more quickly.