when I installed debian 12.7 I created a separated /var directory, along other 2 separated directories (names forgotten).
I also use flatpak and this program is installed in this directory. Executing ‘flatpack update’ I discovered this directory is 95% full, meaning I cannot update anything, because /var is 95% full (only 400 MiB free)
Ideas to solve this?
(I assume you meant “I created a separated /var partition”)
You can move/resize partitions from basically any live usb (via cli or gparted for gnome and kde partition manager for kde).
Shall you want to, you can also merge the var partition with (say) your root partition:
Be aware that you can very easily lose your data ;)
PS: just in case, try running
flatpak uninstall --unused