Since I travel full time, no cloud - not enough data a month (and I don't always have cloud availability), I have to use my wifi hot spot. One thing I've noticed is that cc takes a really long time connecting via wifi to Calibre - I have over 2000 books on my Android tablet. I know it is cc instead of Calibre since I tried a new Calibre library containing just the 5 or so books I want to transfer and it still takes a very long time. Usually just I start the connection and then go make coffee. Currently I'm attempting to delete a bunch off my tablet to see if that will help.
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