vdi to hdd conversion represents transformation of two different types of virtual machine disk drives, namely VirtualBox (.vdi) and Parallels Desktop (.hdd).
The most convenient way to convert vdi to hdd would be to use VirtualBox from Oracle, which you can download for free.
Open VirtualBox and make a few steps:
- Click on File menu ► Virtual Media Manager.
- Select virtual hard drive that you need to convert to HDD ► Click on Copy option in upper menu.
- Click on Next button ► Set Virtual disk file type to HDD.
- Select storage details, new location, Click on Copy button and wait until the conversion is finished.
But of course, if you have access to Parallels Desktop, you can use that software as it should accept .vdi files just fine.