I have been using a 128 GB SD card with my 2014 C250. The said SD card had 7 folders at root (7 different genres) I never had a problem. I recent upgraded to a 256GB SD card and it now has 11 folders at the root level. For some reason the command module only sees 8 folders. Does anyone know, if there is a limit to how many folders command system will read up to?