I’m betting the root of this problem is on how I originally installed the system but I would like another opinion. Or several.
Running Mint.
After analyzing the disk usage, the folder where Thunderbird is installed is completely full. I have four separate accounts in it but a single one is responsible for taking all the space available, through the imap/sent folder, which makes no sense for me, as I send relatively few messages compared with all the messages I receive.
I already considered just purging the program from my system and completely reinstall it but if I’m going to do that I’m better off doing a fresh system installation.
The system has two disks: a SSD running the system core and a HDD for the home partition. I opted to keep the system core on the SSD to speed up booting (and it worked) and used the HDD for storage because. I prefer HDDs for user files, for longevity reasons. The biggest mistake I made here was not using LVM on the disks.
Any thoughts and criticism on this is welcome.
Thank you in advance.


I risk it is. It makes no sense why the space for the mail client is getting full while the rest of the disk is nearly empty.
LibreOffice saves with no problem to the disk. The browser saves small files with no issue. Dowloading large files, on the other hand, returns a error of no available storage space.
I’m just backing up all the files and reinstalling the system.