How to reduce file size?

[supaul]

My WP site has 7 pages total and about 12-14 images. Max image size is 300kb
But the file size is over 350MB.
When I tried to transfer the site to another host using a plugin, it says the file size is huge so it can't transfer unless I buy upgrade.

Now I'm wondering what made it so big in size!

Your suggestion will be highly appreciated.

Make sure first that its your database that is responsible for this kind of absurd size. The reason I am saying this because many times people look into the cPanel and see a huge size, and they just assume that its their database.

But the real reason behind is that they are using plugins which they never use, outdated plugins which are never update & yet still they are installed, plugins which have no importance or relevance to the functioning of their site but once they have installed it they haven't got rid of them thinking that at some point in the future they might need them etc.

And also don't rely on cPanel (specially the data that is shown in the main page of it)too much. Get a FTP client such as Filezilla and download all of your files. Get a backup of your database through cPanel or use services like phpmyadmin within it(cPanel) to do it. Check for yourself which is what.