I’m inspecting my disk about what I should include in my backup and came across the RoamCache folder in a folder where Outlook stores various other files as well.

Inside it, there are a lot of “Stream” files like Stream_Autocomplete_*, Stream_Calendar_* and Stream_CategoryList_*

What exactly is being stored in these files and should I include this folder in my backups?
If so, can I also restore it on another computer?