Thanks Jukka, iGOR ia a nice tool and gdal is the swiss-army-knife for any problems....
Geopackage
in projects with postgis-Data exist the same Problem. Solving with editors like notepad++,...
datastore-Classes, not OS-relevant
The extended description is in the ZIP.
Message "layer(s) not saved"
daily message "not implemented yet"
yes, ogr2ogr works too. But ogr2ogr is a little bit cryptical for individual cases....