File manager folder rules specific per collection

Is it possible to set a folder rule specifically for a particular collection?

What I’m trying to achieve is make the _default folder for one collection updateable from the Admin UI, and I thought this would be the only possible way.

Answer might be no. I can’t seem to get it to work, either for the _default folder or a new folder. What I tried:

[file-manager::scholarships-profile-folder-_default]
name = Presentation (live2)
path = $SEARCH_HOME/conf/scholarships-web/_default2
rules = preview-display-rules
set =

Filesystem:

$ ls $SEARCH_HOME/conf/scholarships-web/_default2
blending.cfg

Admin UI:

scholarships-web / Presentation (live2)

No files to display.