Sandisk x300s SMART error under Mac Pro but perfectly fine under in SanDisk SSD Dashboard

My Mac Pro (and MacBook 2012 as well) reports SMART error under macOS High Sierra - but it is running ok - but I’m scared to put anything on it as all data can be lost :( 

Under Windos 7 and installed SanDisk SSD Dashboard it is said SMART it is in perfect codition (SSD live 100%) and it is running under latest firmware.

What is wrong with it? Or is it incompatible with macOS High Sierra?

I’ve put on it APFS file system and Extended non Journaled file system - no success :frowning: