Yes I did. After refreshing or server restart new files are still not visible.
occ file is located in
/srv/HDD/NAS/NextCloud
new files and all the files I keep in NextCloud are stored here
/srv/HDD/NAS/NextCloud/data/admin/files
maybe this is where my problem lies?
Edit: Finally I installed different version - NextCloundPi and it works exactly as I wanted.