A: At the moment only SMBv1 is supported while SMBv2/3 is in to-do.
While many think that SMBv1 is old and thus deprecated, it is not really true. SMBv2 is a stripped version of SMBv1 with improved authentication. SMBv1 was named as insecure but it is really true for a large corporate networks. If it is your own home network then all devices within your network are trusted devices therefore SMBv1 is perfectly sufficient.
Modern OSes allow activation of SMBv1, so you could enable it until Neutron gains SMBv2/3 support: