it was my first attempt to check list - no change :-(Sorry to go back to the basis, but is there any way that the USB cable/UPS port could be defect or maybe the USB port on the UPS could have been deactivated thru the UPS setup menu?. What model you said you got? Can you try with another UPS (of course everybody keeps a spare UPS in their closet just in case )
- same USB cable inserted to my Win10 machine, UPS recognized, works .... still connected to same UPS
- I have >50 unused USB cables, there is not the primary problem.
- all the NASs have same last DSM upgrade, then no chance to test a difference scenario.