Files doesn´t appear in external site

Good morning,
I have installed an external storage with two levels of access to users.
In the first level, administrators users can create, modify, etc. any file or folder.
In the second level, users cannot create, modify or delete any file or folder.
The fact is that the last files I upload are visible for the administrator users but not for the rest of users.
When I access the PC containing the external storage, the files are available.
As you can see in the attached image, the Admin Sindoh folder has all permissions and the Sindoh España and Sindoh Europa folders only have read permissions.
It is in these last two folders where I don’t see the files.
Can someone help me?