My Cloud OS5 - Indexing taking forever

Photography is my hobby. I am using HOME-NAS to store and backup my photos. So I have at least more than 40,000 photos on hand, .jpg, .psd, or .raw.

To be honest, I don’t need a thumbnail at all. I just want my photos to stay safe and I can reach them anywhere (of course with internet). But I don’t have an option to turn the thumbnail off.

So now it seems that indexing would not stop, and My Cloud mobile app doesn’t work totally.