I'm new with Ubuntu so I don't understand most of it. A few days ago, everytime that I start the computer, I have a prompt box saying that my disk is full and I have the option to check the disk with the Disk Analyzer.
But since I don't have any idea of what to delete I don't want to touch anything. I started checking my user folder and delete everything that wasn't useful there but I don't have much. What else should I do?