good idea :) thx! I tried to handle the nano via mobile only till now - there I noticed that I can´t remove SSIDs, install modules completely or remove them etc..
result "trying it via mobile (S7)"
I formated the sd and tried a brand new sd card as well (incl. formating with as you described). The SD is shown as found with free space. After trying to install modules - the systems tells me modules are not installed completely but free space is getting less.
Now I try it via PC. hope this works better. Lol - maybe you are lucky or I am good in finding issues ;)