My gear: Fiio X3, SanDisc Class 10 SDXC, OS 1.25, German language
In folder view my Fiio X3 doesn´t display the artist´s folders from the SD card any more beginning with "A" and "B". The Folders beginning with "_"are accessible as well as all other folders from "c" to "z".
I wonder when this happened because I´m pretty sure that I´ve allready listened to Beyoncé e.g. with my Fiio X3.
how many sub folder in there? the current firmware only support 256 sub folder and the new firmware will fix this bugs, anyway, the more sub folder , the slowly X3 will be. so we suggest you can separate to several folders.