I wanted to test the "Virtual Files" Feature and activated it on my Windows Client.

What happened afterwards was not what I expected:

• Nextcloud started to download virtual files for all external mounts in my Nextcloud Server, this summed up to 1.6 Million Files, 9 TB of data
• I left the Client running for 4 days, but it was only 60% finished
• the .db-wal grew to 31 GB

I removed the Virtual Files at this stage. Please allow an option to be either selectively which folders to sync in combination with Virtual files or warn users, based on some file number limit, before enabling this feature.