There is Two way to backup your database
One:Folder backup In windows go to xampp installation folder xampp> mysql > data > here you find your database name folder. copy it and save it . Also copy ib_logfileXX and ibdata
you can use any other computer just go to xampp installation folder xampp> mysql > data >pest it here.
Two:export database .sql backup In browser go to phpmyadmin and select your database >then in to the top mane click Export. then write a name in New template input box .then click go .you will find a file is down loaded.
you can use it any other computer then go to phpmyadmin in browser and create a database and on the top menu click Import click choose file > select this file witch is downloaded > then click go button.
https://stackoverflow.com/questions/15294830/backup-mysql-database-in-xampp
https://stackoverflow.com/questions/38759870/xampp-mysql-table-doesnt-exist-in-engine-1932
