Anyone know how to do this? I have a collection of about 700 books in epub format. I have them all transferred to my phone but only way I can see to do it is one book at a time. That's too much work
If these are DRM-free books (and I hope they are, and you acquired these legally), you can upload them via the Play Books website. They will reside in the cloud but you can also download offline copies of just the ones you want. I might be wrong, but I doubt you'll need or read all 700 of them at once, right?
Unfortunately the only way to sideload ePub files to Play Books is through their webpage. I'm not sure if it'll work through your phone's browser though, might be worth the try. The mobile app only allows you to directly upload PDFs.