When I walk through the system folders of my old android phone to clean it I could see that there was a mtklog folder containing an audio_dump folder, itself containing many files in the form VMLog_%Y_%m_%d.vm in the Internal Storage folder.
As the name of the folder suggests that I have to make audio files I tried to play them as PCM RAW file, without success. Despite several searches on the file format I did not find any information.
Someone knows what these files are, if it is possible to read them to know what they are or just if there is a risk to delete them because I would not like to make the system unstable by deleting them. Thanks for your help.