Hey there again, Alyus!
I'd recommend you run both the QUICK and the EXTENDED tests from the WD's Data Lifeguard Diagnostics tool. This way you will be able to determine the SMART attributes, just make sure you click on view SMART data above the list of drives, once the tests have passed.
I'd also still copy your data somewhere else as well and make sure you keep regular backups of it there.
Please, monitor your drive's health and benchmark the SMART results between the two HDD diagnostic utilities.
SuperSoph_WD