What board is the black one? What is it called? The label says "Nano", but if you look at pictures on the Nano online you can see it's the blue board. I ordered both a while ago from a non-genuine manufacturer and forgot their types. Both work great with the Arduino "IDE" on Nano settings, have ATMega328P. The blue one has a USB-Mini port while the mystery board has a USB Micro like an Android phone or a Wacom tablet.
Sorry if terms are slightly off/inaccurate, I know Stack Exchange can be extremely critical of unfamiliar "newbies".