I have increased your available diskspace.
However, moodle is not the best suited for free hosting, you are close to the max Inode usage, and this will only be increased if you chose to upgrade, starter plan gives you a bit more at a low cost, and it might be enough depending on how much you need to add to the site.
Do note that for Inodes every folder and file counts as one Inode each, this includes all mail that you keep on the server.
I also noticed that you have hit the daily limit for sending mails, this means that mails you send may not be delivered until the limit is reset.