Hi.

Thanks for the answers.

I haven't tried moving it to the internal flash memory yet, because I don't think it will work. Is it worth trying? :-/

The same iGO Nextgen worked properly on my old Huawei P8 Lite smartphone (Android 6 or 7 if I'm not mistaken). And "iGO_Avic" and "iGO_second...." folders were also used there, referencing via "/mnt/ext_sdcard" (Huawei P8 / Android 6).

However, there is no such symbolic link in the new smartphone (checked via Total Commander in the smartphone). None of these symbolic-links or other links are there. There is only one, but it is not functional: "(root)/mnt/sdcard". If I tap on this sym-link in Total Commander, nothing happens.