I've been traveling for a couple of months and haven't used my laptop. Then, for a couple of weeks, I couldn't use my iPad.
As a result, I have extra comics on my iPad and extra Comics on my MacBook.

Normally, I synch always from my laptop to my tablet by importing the comics through USB, just by dragging them in Finder > Ipad > Files > Yacreader. There, I can only see the folders, not the comics.

Is there a way to synch between both devices so that they both get updated with what they do not have?