virtualbox.org

I installed ovirtualbox to use linux and i used 8 gb for it's partition
But i needed to free some disk space and decided to delete it then uninstall virtualbox to get those 8 gb back
But after i did that , i didn't recover the 8gb i needed
This has been bugging me for some months and i am wondering how can i recover my 8 gb of disk space

Find the guest storage folder and delete the *.vdi file