Bijlagen toevoegen aan e-mail gaat niet. In het bestand "Documents" zijn talrijke onderdelen ondergebracht. Wanneer echter op "Bijlagen toevoegen" geklikt wordt, verschijnt onder iCloud Drive, de afbeelding "Documents" met daaronder : "o" onderdelen.
I suppose you're using Documents by Readdle. To get the files to iCloud Drive, you have to export them.
In the app, open the file you need in iCloud Drive. Tap the Share button, and select:
The next screen will show you iCloud Drive and it's folders. Select the one you prefer (Documents, if there isn't another one), then tap:
The file will be available when you need it as an attachment for your emails.