In MYSQL, each table in a database is stored as a set of three files with the table suffixes .frm, .MYI and .MYD. Generally, MySQL will ignore non-database files contained in the MySQL database folder; however, any script commands to drop that database will fail.
While the MOVES default database folder includes a "read me" subfolder, we highly recommend that you store supporting spreadsheets in a separate folder with your MOVES runspecs rather than in the MySQL data folder.