[kid] 
comment = kid
path = /mnt/sdb/kid
public = no
valid user = kid,yun
printable = no
# chmod -R 777 /mnt/sdb/kid

[yun]
comment = yun
path = /mnt/sdb/yun
public = no
valid user = yun
printable = no
# chmod -R 700 /mnt/sdb/yun