Lightroom: Allow configuration of location and max size of preview and smart preview cache

[Mark_Woon]

I would really like to see a way to configure the location and max sizes of the preview and smart preview cache.If I could move the preview/smart preview cache away from the Lightroom catalog, this would allow me to easily sync the catalog via Dropbox/OneDrive/etc.I'd also like to set a max size for the preview and smart preview cache (so I don't run into space issues on smaller SSD drives). Once max size is hit, it can cull old/unused cache entries.

[DonkeyPhotez]

I definitely back Your two ideas because they (also) imply for the user to become (more) conscious of the whereabouts of theses folders/cache.
(Idea : In preferences; such as with existing link "show catalogue in explorer").
Helpful to understand backup strategies (of our own).
( Also add "show me my presets location", etc.,.)
( Your idea to me is not only practical but to become conscious about the weight of such each folder, is good, in addition excellent the proposed option for rules to overwrite if desired.) 

[FeedbackCommunityMember]

I'd just like to add to this. It's a major issue. I want previews to live on my SSD in my laptop, but they grow faster than I can add disk space.