2025-09-10 00:00:00 .nomedia files tell Android not to scan certain directories for images of videos or audio files. This search is done systematically each time you turn on your device, which slows down the launch of the system, especially if you have many files. Also, since the directories containing these files are not scanned, their content does not appear in the gallery. This is a simple way to not display certain files there. Warning, this is not a tool to protect your privacy because these files can still be seen, especially in the file manager!