Hello, Hamlet.
The latest version firmware is applied to device.
Regarding software “WD My Cloud” I use the latest version too.
I’ve made some additional investigations and found that if I create folders with cyrillic letters in My Cloud via iMac (with MacOS), everything is fine. But when I do the same via Windows7 computers, the folder name is not displayed in WD cloud clients, both mobile (iOS) and desktop (Windows7).