I am glad that you reply.
The problem I have solved.
The cause was that the default storage location was a SD card.
Because of this setting, the folder path failed to be recognized as an error.
I set the default storage location to internal storage and it worked fine.
Thank you for your help.
2018年10月27日土曜日 17時37分33秒 UTC+9
ma...@styluslabs.com: