Adobe Acrobat app will not open on iPad. Tried downloading another app and will not allow transfer from file sharing section in itunes
Are you trying to backup your local files using iTunes and reinstall the Acrobat DC for iOS app?
Does iTunes display an error message? Would you provide the exact text of the error message?
uunable to backup files via iTunes. "File could not be copied because an error occurred. The required file cannot be found". It starts copying and then gives this message
We've heard from many users that the desktop iTunes app often fails to copy files for some reasons.
You may find answers in the Apple Support site.
Have you tried other desktop File Browser apps (such as iExplorer, iFunBox) instead of iTunes? For example, you can use iExplorer in the free demo mode for file system access. Other users had successfully copied files from/to iPad/iPhone using it.
Please give it a try and let us know if it works for you.