In addition to what @nallath said, you can push the little downward arrow to switch from "Save to removable drive" to "Save to File" and see if you can save the file after that.
That's why you need to create an issue on the github page @nallath linked to, with logs, so the error can be examined.
Recommended Posts
nallath 1,125
By posting the logs on github: http://www.github.com/ultimaker/cura/issues
Link to post
Share on other sites