Only Google Drive files within Google calendars can be synchronized to other devices!
To sync Google Drive attachments you have to activate this per calendar in the calendar list.
aCalendar attachments are just linkings, the files are not stored within aCalendar.
If you move or delete the original file, the linking will be shown but the file itself is not available anymore.
To add an attachment to an event, simply press the Attachments button in the event editor.
The following options are presented:
- Take photo
- Image from gallery
- Google Drive file
- Dropbox file
- OneDrive
- Local file