Windows os can't access samba share


I share my linux devices with this smb.conf file, no issue for my home.
I see the linux devices with windows but I can’t access to the linux devices, login and password needed for windows to access the linux devices.
How to allow windows to access the linux devices without login and password ?

Thanks for your help.

   workgroup = WORKGROUP
   server string = M1
   security = user
   passdb backend = tdbsam
   printing = cups
   printcap name = cups
   load printers = yes
   cups options = raw
   client min protocol = NT1
   server min protocol = NT1

   path = /srv/M1
   read only = no
   #read only = yes
   guest ok = yes
   create mask = 0777
   directory mask = 0777

Some time ago there was a topic in the german section

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Thanks for your answer.