yesterday I have configured MyCloudHomeDuo (MCH) for the first time. Over night it was updated automatically with firmware/software 6.6.1-123.
My only usecase is, to replace my outdated TimeCapsule-device and to have it for TimeMachine-backups ( TM ) running on macOS 10.14.6.
I was able to select the MCH-network drive as Time Machine backup disk and the first backup was manually initiated.
TM-backup started, but then stopped after copying 20% of the total.
Now, TM starts every hour with “preparing backup”, but then stopping after approx. 10 minutes, without copying any files.
I have already disabled any endpoint protection (e.g. Bitdefender, macOS Firewall), UPnP is enabled on the router (UniFi USG).
Do you have any hints what I can check next? Are there any e.g. port forwarding rules required?