I see the folder /photo as you mention and it seems correct as one of my shared folders in the Control Panel of my Disk Station has that name and a relevant "shared folder size".
Now, my problem is to find that folder. I have searched and found none with that name. I have found two folders "Photos" which might have been created by Synology Photos - but the only content in those seems to be collected from my mobile which I don´t care about. Wherer are my files located, I need a folder path to "/photo" that seems hidden somewhere.