Newbie question here. I'm getting error "Not implemented - KFX is a virtual book format and cannot be transferred from the device" error in Calibre when trying to add a KFX file to my library. Any thoughts on what I might be doing wrong? I'm using Calibre 6.7.1, KFX input plug in 1.49.0, DeDRM 10.0.3 and trying to transfer a KFX file from a USB connected Kindle Oasis on a Mac.
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