add option to select whether to always download full image or uses only preview image

In and iOS, it shows it download full image during preview and shows better quality image,
but iOS coms with problem, taking large phone storage and large mobile data usage.

in case Android, there seems people doesn't want to iOS way and want to prevent large device resource issue.

There were also many discussion on preview size and server work-load and image quality on Android App.
I'd like to have better quality on Android preview, but don't want to spend large resource on server CPU for generating preview, nor mobile device data.

so why don't we add option to select whether to download full image or uses only preview image, does this 'only when wifi', 'mobile / wifi' or 'never does this'
this seems partially supported, by clicking 3-dot, and select download one by one, but it is annoying when I review large number of files.
even the caching storage in mobile device, provide max size of storage, and remove old one when it is full

thank you