what wrong with my 2 tb WD black hdd ?

[sosolola]

what is that NA thing in the smart ?

 

[Boogieman_WD]

Hey there, sosolola.

From this screenshot it doesn't seem like anything is wrong with the drive. Do you experience anything unusual or any errors? It looks like N/A is the description of the attribute that it is measured for the SMART data (and that description is missing for some reason). I'd recommend that you download DLG (Data Lifeguard Diagnostics) and run both tests (Quick and Extended), to see if anything unusual pops-up. Here's how to do that: How to test a drive for problems using Data Lifeguard Diagnostics for Windows. Note that it is recommended that you backup any important data which you might have on that drive, before you test it, if you have experienced any problems with it.

Hope that helps. Please let me know how it goes.
Boogieman_WD