I have a temp raster (saga raster) file. How can I make a copy of this file (like "save as")?
If you cant find the temp file...
I've several times simply run the raster calculator on the temp-file to result in zero difference like "x >=0 OR x <=0" ;-) This multiplied (cause always 1) with you temp-file will give you a raster you can save.
Normally the files created by SEXTANTE toolsets like SAGA are saved temporarily somewhere. Click on the raster and look in the options/metadata.
In the QGIS Master version (1.9) there is also the option to save the raster via "save-as" if you rightclick on the rasterlayer.
But you could also simply use the gdal-tools like this (without prior testing): -> Just use the gdal tools with standard-options. For example make a reprojection with the current proj4.