Local files are suitable for loading/saving files from other mindmapping applications.
Export your design as a PNG image.
Firebase offers real-time synchronization for true multi-user collaboration.
Use this to access a generic DAV-like REST API.
Maps stored in Google Drive have a permalink URL and can be shared with other users, if you allow this by setting proper permissions (inside Google Drive itself).
Les grands voyages du XVIe siècle
éléments de la carte