What is the easiest method of backing up files in the Adobe reader app on iPad?
You can upload your files on Document Cloud using Acrobat Reader app.
Alternatively, you can back up your PDF documents to your Windows or Mac computer.
How to backup and restore PDF documents on iPad/iPhone using iTunes
File transfer using a cable and iTunes would be much faster if you have a large number of files or large files (in size).
Retrieving data ...