I am not sure if I have the exact answer, but all top reading apps claim to have option for cloud syncing (It works through Google drive or Dropbox API) also user data/files can sync across multiple devices. You may try to cloud sync your generated user data (reading progress, highlights, notes etc) and when you are done with factory reset you can sync again to.get back those
Last edited by webroot; 07-29-2015 at 07:03 AM.
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