welcome to the forum,
did you see this in the rclone docs?
https://rclone.org/protondrive/#protondrive-enable-caching
--log-level=DEBUG --log-file=./rclone.log
ls -R /some/empty/directory
or to do the rclone way,
-
check out my summary of the two rclone mount caches
https://forum.rclone.org/t/status-about-using-rclone-for-music-storage-playback-in-2021-access-times-improved/27648/34 -
pre-warm the vfs dir cache.
- to the mount command add
--rc --rc-no-auth - after the mount is live, then run
rclone rc vfs/refresh recursive=true