I have a Macbook Pro running Mojave 10.14.4 and a My Cloud Home running version 5.0.5-104.
When I try to copy a folder (size ~15 GB) on the My Cloud Home, it progresses extremely slowly up to ~150 MB, and then freezes the Finder app for 10-15 minutes. I then get an error code 100057 with the message :
The operation can’t be completed.An unexpected error occurred (error code 100057)
I had the same problem large folder stops half way through.
My folder has several hundred other folders inside.
I copied each one individually. Then copied whole load of them. Worked fine but went to make coffee Mac pro went to sleep thought no bother but when I woke it up the copy had stopped again.
Got it done by watching each folder as it was copied took an hour but I stopped the Mac going to sleep.
its a timeout issue on the WD Device - I had it on my MBP too …i did a non-destructive data reset on thje WD device …fixed it …no idea why it drops like that
How do you do a 'non-destructive data reset on the WD device?"
I have had my internet company, computer company and everyone waiting on my server to work as expected, have to talk to me about this.
In my help-desk emails, it is not getting very far for help and it’s been 5+ months.