As in the topic, after restarting the English language and the whole thing after resetting the settings, the suspicion was that the battery does not hold, it was replaced with a new one and now it works on the battery but there is still no saved settings. The fault of the software or something else, because it happened like that overnight, the sounds just started appearing at startup and these were turned off. After the lack of memory, the recorder normally records even the last file after turning off the power.
