* "Save file" = "print it"*
This application is designed to automate the printing process. The application uses full file system access to track new files in the directories you specify. This is an optional extension for the RawBT print service. Before you start, provide the required permissions.

One example of such automation.
Your PC - ftp client - ftp server on device - directory (observed) - AutoPrint - driver RawBT - thermal printer
Any other mechanism can be used instead of FTP. For example, synchronized cloud storage folders.