First of all: Windows 8.1 QGIS 2.8.2 Wien
I used the GRASS module r.watershed to delineate watersheds and get flows with a DEM. It worked fine so everything is OK so far. But now what I want to do is to export these new GRASS raster layers to Geotiff, and later to vector polygons or lines, in case of flows. On the one hand, I tried to use the GRASS module r.out.gdal.gtiff (Export raster to GeoTiff) but the problem is that the file format it exports is NOT Geotiff! (I don't know why?) And on the other hand, I try to right-click on the GRASS raster file and choose "save as" then I choos Geotiff format, ok, and.... Crash... Finally, I chose to do the same "save as" only the view area, and it works, but the Geotiff I get is totally grey, can't find the way to see the polygons I got when it was the GRASS raster. I don't know what am I doing wrong... :( (Screenshot: "basinsmoshi" is the new .tiff file, completely grey).
I wish anyone could tell me how to save this GRASS raster file into a Tiff and then into a vector file, so I can edit the polygons, etc...
Finally, I ran it, successfully finished, but... when I load the new raster, it simply has no content (values are "nan nan"):
So again, I am sure I am doing something wrong :( but I don't know what it is. The only thing I want is to have these watersheds as polygons in a .shp file, if you know about any other method?