Opening .hdr with open dialog seems to be a better solution than using GeoTiff export because QGIS is working faster. Thanks! Yet there seems to be a problem with the colour setting because I see the whole picture in red as is described here: Export from SNAP to QGIS . I can’t solve the problem as described in the response #4. I tried to import the colors (see screenshot) as I saved it in SNAP but QGIS can’t open the .cpd files.
Thanks for your help in advance!