Can see folder but not file with local external storage

I am trying to use a local external storage for my nextcloud that is shared between two dockers. I would like to avoid mounting the repository as read/write to the nextcloud instance. Currently, the folder is mounted as read-only (:ro) to the nextcloud docker.

I’ve set the permission to all folder and files in the folder to 755 with:

chmod -R 755 .

I configured the local external storage in the administration page, and I can see the folders and navigates but not the files… Any help appreciated.