Steps

1. Stop service
   windows: services.msc
   Service Name: MariaDB
2. move db data files into the new data folder
   (Remember to include folder “mysql”)
3. remember to copy file “ibdata1” as well or it will cause “table doesn’t exist” error.
4. Restart service

Reference:

1. https://www.arekibo.com/blog/restore-a-mysql-database-from-backed-up-program-files-(-frm-myd-myi)-no-sql-dump-required!/
2. https://www.752club.com/mariadb-mysql-table-doesnt-exist-in-engine-error/