We work with light data (as vector and geopackage files) and very heavy data (rasters, aerial orthophotos, etc...). Heavy data are used as basemap and they don't need to be updated. Light data are used from field workers, they are editable and they need to be updated on cloud. It could be great to have a QfieldCloud project on device with different "file destination" data where: some data are copied in device (heavy rasters, etc...) some data are synchronized on cloud (editable files, field data, vectors, etc...).