Hi... @petros

This way everything works.
Try opening the folder iGO_Avic with some file manager,to find the real name of extsd card.
I think it "/mnt/m_external_sd" from error message.

"The folder is missing or unfinished.
/mnt/m_external_sd/iGo_Avic/license.zip:/mnt/m_external_sd/iGo_Avic/license.zip: open failed: EACCES (Permission denied)"


Now if it is right to add to SYS.

for example: in my own sys is "/storage/extSDCard/iGO"


[folders]
data_folder_name="iGO_Avic"
linked_root_list="/mnt/m_external_sd /storage/extSDCard"

move "iGO_Avic" folder to extsd card

android/data/jp.pioneer.mbg.avicsync/files <- iGO_Avic

1.Rename or delete save folder
2.Go to settings -> app manager -> iGO and clean the cache.
3.Restart and try...