Resolved new directories in /var/www/vhosts

[LiamH]

so I was looking in /var/www/vhosts/ today and discovered two new directories. /fs/ and /fs-passwd/
fs-passwd also contains a dav.passwd file containing what look like users and hashes.
What is the purpose of these dir and the passwd file?
sorry if this has already been asked, I did search, but could find nothing relevent and am in search of a fast answer.
Thanks in advance.

 

[LiamH]

bump bump?

 

[FreeUserName]

these are the File Sharing folders, see File Sharing