Accessing base coordinates saved in SD by serial bluetooth configuration

I am interested in configuring the PostCard in base mode by serial bluetooth configuration using coordinates saved in the SD.
I already do that from wifi config..
Is it possible to access the SD and the saved coordinates by serial bluetooth config?
I am interested because I have found that the serial bluetooth configuration is much more stable and secure than the wifi configuration.
Sometimes the wifi config does not save the changes or I have to refresh the web page for it to do so.
The changes by serial bluetooth config are instantaneous and secure.
I appreciate the comments.
greetings

Angel