Samba first run

However my SAMBA quest conniue:

I made share mounted all using Dietpi launcher.

I can access MYShares as I made small modification to smb.conf.

[MyShares]
        comment = SDCARD Share
        path = /mnt/sdcard
        browseable = yes
        create mask = 0664
        directory mask = 0775
        valid users = dietpi martin
        writeable = yes
max connections = 8

But when I click on MyShares on windows file manager it asked me about user and password, I put martin and pass, all went well I get acccess, BUT that is is I can not make folders or copy files over network, nothing.

This is crazy