I have a NAS drive on my network and with mmy files if I click on network and select SMB it shows my NAS unit and asks for username and password which I enter but it just tells me to check info. With another app and same info it works.
Maybe a problem of the user, that is part of a domain ¿how does the samsung solves the domain/group? I can connect through other apps that ask for the domain. Also through FTP but I need SMB
