I have an app that exports a backup csv file via email which I can then use to import back into the app via "copy to". Up to iOS11 it was all working fine. Now with iOS11 in the mail app I get the name of the file and "comma-seperated values" when I try to open the attached csv file. My app is also not listed in the "copy to" options. Not sure if this is related to not being able to display the csv file as pre iOS11 I was able to display the csv file from the mail app and "copy to" my app without issues. Has iOS11 introduced a setting for certain files?