@lakotaubp The problem occurs even after a reboot so the RAM is almost free.
Concerning the storage memory the phone was recently reset to defaults so "/userdata" is almost free too. The partitions "/android/system" and "/" are most used but it is the readonly partitions.
Returns of "free" and "df" commands here : https://bin.infini.fr/?b9534cc1de260140#B3TQy97u2GQB8hsC5YnHAbACfN7EvUbMzHD5NN3RaJpd