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It’s easier to read sideloaded files on Nook devices now.
Users on Reddit have discovered a new feature for their Nooks. ePub files that have been manually added will now have their reading progress synced across devices — a feature previously only available for ebooks purchased on the e-reader.
This feature is only available on Kindles for files that have been uploaded through Amazon’s email service, and is still not available on Kobo devices.