I just download Aerofly FS2 sound upgrade. The read me tells me to back up my .tbs files. I did a file search and did not find any. I use windows 10. I did a search for sounds. I found a steam folder inside a steam folder. It is simple after that just unzip each aircraft sound into the right folder if I can find it. Please help.
Your .tsb files (not .tbs) are all inside each of the aircraft included in your Aerofly FS 2 installation. Look here:
C:\Program Files (x86)\Steam\steamapps\common\Aerofly FS 2 Flight Simulator\aircraft <--- inside this folder you have all your aircraft in their respective folder
My Steam is in C:\, but you have to use your own path according to your setup.
Hope this helps.