File link does not work
Ensure the link does not begin with files.mtstatic.com
In the Link window, the Link to: field should show /@api/deki/files/
When using the Browse or Search functions in the Link window, the @api/deki/files/ URL is used automatically
Links beginning with files.mtstatic.com have expiration timestamps and will not work after the time included in the URL as the
The timestamp in the URL is given in Unix time
Links to files beginning with www.example.com/@api/deki/files do not have expiration parameters and do not expire.