is there a way to export number of files at once to a certain format?
using the UI
if not it would be prefered if we can do that
same as when saving the opened products, its really easier if we could save all of them at once
its really tough saving them one by one
You can also try pconvert.
Call on the command line pconvert<.sh/.exe> -h to get some help.
You can use more output formats as documented in this help. For example you can also use NetCDF-CF.