Android photo thmbnails-low resolution

I have lots of photos (>100GB) on my Lima and they are basically impossible to find on my Android.

The thumbnail does not seem to upload by itself unless I am in that specific folder.

Pictures are ~5MB and each has to be loaded in order to watch which means it is not possible to "scan through" pictures in order to find the one I am looking for.

I would like:

1. Lima to automatically cache thumbnails

2. Possibility to browse the pictures as low resultion (expanded thumbnails) and pictures incrementally loaded (increasing resolution) while watching.