As suggested in Google Help , the files may be related to 3rd party app system files. If you're still seeing these files, would you like help to: Identify which app is creating them? Locate the specific directory on your phone to delete them? Scan for potential malware that might be causing them?
Users report multiple copies (e.g., EVT_IO_INSTALLATION (2).mp3 ) accumulating in the Music folder or /storage/emulated/0/Music/ directory. Download EVT INSTALLATION (2) mp3
The files are typically harmless, showing no signs of corruption or error messages, though they are reported as "annoying" due to their prevalence. Steps to Take Regarding the Files As suggested in Google Help , the files
If the files reappear, check for newly installed or suspicious applications, particularly in the App management settings. As suggested in Google Help