Unable to backup

I’m on a Galaxy Note 8, with a 256 gb sandisk internal card installed, using memory zone and logged into Google drive.

When I do the initial manual backup to drive cloud, I get “unable to backup” message after a few minutes during backup.

No other explanation or details given. ???
How do I know what’s going on? How do I fix and complete backup to cloud???

quite a support team you have going here. impressive.

I have the same problem, hope to get help. 

once I also face the same issue in my Samsung s8+ Android device. After getting this issue I used pro version of Titanium Back Pro App. Which I can easily download from below link. If you still have the same problem then you can also use this free Titanium Backup Pro APK to solve your query.