Virtual Box is a powerful tool from Oracle. It creates virtual machines on Windows, Linux, Mac etc. I have my own OVA file for another instance to create new machine platform.
Simple steps to import OVA files into Virtual Box
Step 1: Open Virtual Box, on top of menu will showing some options like File, Machine, Help
Step 2: Click on File option to show the all details below
Step 3: Choose option Import Appliance
Step 4: Click on Folder icon for select your OVA file in the import box.
Step 6: Deploying your OVA file into Virtual path then click on Next button for further steps
Step 7: Select the import button in bottom. If you want to change details go to main Settings menu with in Virtual Box.
Step 8 : After importing your OVA files to import into Virtual Box it will take more time. For setting up all files into your VM
After successfully importing ova file then open and use it simply.