There is another easy way to get a manual backup besides the great app imazing. iFunbox is another easy and free app that will do a complete backup of your iPad. Fortunately it’s easy to use and fast.
Simply, connect your iPad to your Mac or PC, then run iFunbox and use the disclosure triangles on the left to access App File Sharing and unrealBook. The right side will show all of your files. Command-a will select all files and command-click will select or deselect single files. Use the Copy To Mac button to copy all the selected files to the Mac. That’s it! Now you have a manual backup of all of your files. (Note: do not copy the inbox when copying the files back to the iPad or another iPad – just skip that folder).