Mysql physical database location on WIndows

I work with Linux, but also have to work with Windows, because most commercial applications are in Windows and the manufacturers will not switch to Linux.

There are already commercial applications that are already adopting MySQL instead of Microsoft SQL Server.

And sometimes is not where the data files are, because they use the built instead of the default MySQL installation.

Just need to find the file named "my.ini", this file contains the location of the database.

Why is it useful?

• To delete duplicate files, when going from MySQL to local MySQL for reasons of bugs and new releases. 
• To make backups with Cobian Backup, which is free and the manufacturer is selling the source code.