I'm using Windows and always used the iFunBox-classic to be able to backup save games, but after the update to iOS 8.3 trying to open the application by iFunBox-classic display anything, it is a blank screen.
Backup other things is working. Updated iTunes to the latest version and (64bit), but the problem persists. I uninstalled it, rebooted, reinstalled iTunes and iFunBox, but the problem persists.
In iFunBox (non-classic) show this message:
App Sandbox access is restricted by Apple to ones with "iTunes File Sharing" enabled since iOS 8.3. Jailbreak is required to open the sandbox of this App.
I need to move saves (app data) from my old iPhone to the new iPhone. Is there any alternative to backup save from games without needing the jailbreak?