[SOLVED] Thanks @JoshData for the given guidelines…
Finally solved both questions by:
- creating /mnt/blockstorage/owncloud folder
- copying default /home/user-data/owncloud to /mnt/blockstorage/owncloud
- chown -R www-data:www-data /mnt/blockstorage
- double-checked * /mnt/blockstorage /* folders & files are CHMOD 0755 and 0644 respectively.
- creating the symlink as ln -s /mnt/blockstorage/owncloud /home/user-data/owncloud
Note: With the symlink /home/user-data/owncloud pointing to /mnt/blockstorage/owncloud fix the ‘block storage’ 50Gb mounted disk to be used for ‘owncloud’ data, only and keeps the default (remaining) 11.8Gb disk for emails.
Hope this may help other(s)