import - How to deploy zippedfolder.sql.gz.gz on my MYSQL server on my windowsplatform -

how deploy zippedfolder.sql.gz.gz (its backup existing database) on mysql server on windowsplatform?

extracting twice throws error 'archives not found' though size not zero

also, importing directly via phpmyadmin throws error because extracted file has linux commands mysqldump doesn't recognize

you may try removing .gz extension. i've received mysql files disguised .gz @ end, , not in gzip format.