Question:
Is possibly something missing in the overview? Because what about the added (blue) part (WRITE → Own app)?
Is there any way to write (save) → non-media files e.g. to /Documents or /Download (targetSDK=30, without MANAGE_EXTERNAL_STORAGE permission)? Probably not, but I'm not 100% sure.
See also here.
It would be nice if someone would shed a little more light into the darkness here.
(It's a little opaque, at least to me.)