With the problems I've had getting Kindle Collection to work right I might just take the long term in deleting what I currently have on my Kindle as well. I am putting those I have read into a "Read" collection folder. Of course I'll have to update what books are where often and purge those I've read eventually, but it might work out easiest that way. Some I will keep for the long term anyway since they are reference books. And I don't know if I could get my monthly magazine Kindle files back if I did a factory reset on the unit.
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