PROBLEM SOLVED.
solution for those who have the same problem
The root directory is not manually. The control should be adjusted with the arrow keys.
/media/usb/picon
Also, values such as usb source sdb1 sdb2 must be compatible.
I edited the picon py and fstab files. I set it to sdb1 in that section.
https://www.vuplus-support.org/ thanks '' ekremtt ''member helped
Thank you