Export to .tif


I downloaded a SAFE format file from the sentinel 2 hub and need to export it to a .tif/GeoTif.
I resampled to 10m resolution using the SNAP toolbox on import. Using File/Export the progess bar is stuck at 0% (for more than 14 hours), exporting via View/Export View as Image (as described here: Exporting RGB image as a Geotiff) I only get a limited number of bands, also the spatial resolution is changed.
Same problems occurs if I only use a very small spatial subset of the image to reduce data size.

Any ideas?
Thanks in advance for the answer.

Windows 10