Greetings.

Thanks for well formatted code.
I converted the code according to my FatFs as mentioned. Everything working perfect.

Only issue is, I am unable to put value and string with the functions ini_putl & ini_puts in config file.
After using the ini_puts, the other files inside the sd card are renamed with different format.
Attached image for your reference.

Also, as per the document I have not defined the read-only in the header.

Suggest me where I am going wrong.