Wdfmb_liveduo doesn't find share for mirroring on MyCloudEX2Ultra

I 've buy EX2Ultra NAS only for backup all attached hardware of my home network.
My problem is, that my liveduo DOES find the EX2Ultra, but DOES NOT find any shares for mirroring. Are there any administer-option to be set or specal named shares for being found for backup / mirroring?

Thx

@abeltz if you updated to My Cloud OS 5, you’ll need to change the Windows Protocol to use SMB1,SMB2,SB3 & NTLMv1 and NTLMv2 under Settings.

Succeed! Thx!