WD Photos on Ipad

HI, I’ve uploaed tons of photos on MY Book Live, on the Ipad Application WD Photos, i can see the folders but just few photos there. So some folders showed all photos, some others showed zero photos. Any idea?

Has the My Book Live had time to index and transcode the photos?

I don’t know what “tons” means, but when I uploaded 10s of thousands of photos, it took almost a week.