My dashboard synchronization doesn't work

I have a problem with adding my dashboards to the 2din 9" Android 12 radio, I cannot add my dashboards by importing the file because the radio blocks access, I have a subscription to realdash but I do not have dashboards synchronization on my account, how can I add my dashboards project?

Solved, installing another file manager allowed me to add my Dash

Exactly what I did! It seems to me that the original does not recognize files like these!