There is few steps to access sharing windows folders from Mint linux on VirtualBox.
Sharing folder at Window7 is C:\temp-VBox
1. Power down Mint linux from VirtualBox
2. Go to setting mode of guest OS/Mint Linux from VirtualBox manager console.
3. Click ‘shared Folders’
4. Add shared Folders (In this case, we will add a shared folder on Window7 system
5. Navigate a folder that you want to share from Mint linux on VirtualBox. In this case, ‘ temp-VBox ‘
6. Set folder name ‘ temp-VBox ‘. It doesn’t have to be the same as actual.
7. Power on Mint linux from VirtualBox
9. Finally, mount the shared folder to local folder.