I have a WordPress backup file(.rar) which was taken 3 years back and I don't know how or using which plugin(Someone else did that). I need to restore the file to my new WordPress site.
I have used many plugins and so far it has been a failure. Most of them need to be premium to restore the backup. I don't have phpMyAdmin or any other control panel too.
Is there any other way to restore the backup file to my site?
I am a beginner in WordPress and php. I really need help.