Thank you for the post.
Is the iOS device locked with a passcode at the time of the transfer? I can only replicate this when the device is locked with a passcode.
More information on this feature can be found in FileMaker's Knowledge Base article 11877:
"A valid passcode will need to be entered before files can be copied off the iOS device OR to the iOS device using File Sharing in iTunes."
It might be nice if this was indicated in the error message!
The existing error message is very misleading!
Thank you for the reply.
The error message comes from iTunes, so per your suggestion the title of our knowledge base article was changed to:
Why am I getting a "<FileName.fmp12> could not be copied because you do not have permission to see its contents" error message when copying files to / from FileMaker Go using iTunes?