My main computer, an iMac, is being repaired, so I'm trying to use an ancient MacBook Pro running El Capitan for a few days.
Here's the problem: only 655 MB of 120 GB storage is open. Most of the 120 GB is Dropbox data that's synced locally on the laptop, so I picked some bigger files and used Smart Sync to mark them as online only.
It seemed to work, and available storage was soon up to 1.07 GB. But then Dropbox stopped syncing and gave me the error message: "Can't sync (not enough free disk space)." How can I free up disk space by syncing if I don't have enough disk space to sync?
I'm also getting "Your startup disk is almost full" messages and "Your hard drive space is low: Dropbox can't sync until you free some disk space on your computer."
I'm not a sophisticated computer user, so please make the explanation as simple as possible! Thank you.