When copying any files from any linux with KDE Plasma to nas Synology, this error occurs. As a result, a .part file appears on nas with the same size as the original, but cannot be renamed. When copying from Windows on a virtual machine, everything is ok. The rights in the nas settings are right everywhere.

I checked it on Ubuntu - everything works fine.
The error turns out only for KDE Plasma.
Please help to solve the problem!