Funny enough, I have excluded my pristine Kobo WiFi refurb from ANY sideloading - I have NEVER connected it to my PC - only WiFi downloads - for this VERY reason! I sideload with my first Kobo WiFi and have had some real touch-and-go moments.
Of note, though, it takes FOREVER to update my library via WiFi - and my library isn't even that large. Can't imagine what it will be like when I have hundreds of books!
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