Mysterious symbolic link

My Cloud OS 3 Personal & Network Attached Storage My Cloud
3

I’d guess that is the culprit somehow.

log in as root via SSH
then execute the following commands:

cd /shares/Public
rm Public

This should remove the symbolic link. Since it is not rmdir, it shouldn’t remove the target directory. But you could create a test directory, create a symlink to itself in the same way, then test the deletion…