Farstone VirtualDrive Pro is a software for virtual CD/DVD cloning. It converts your CD or DVD into a file that can be played in one of the 23 virtual CD/DVD drives emulated. It can play your files at fast speed of up to 200x. It saves you from the wear and tear and loss of your CDs or DVDs or Blu-ray Discs. You can make backup copies of your virtual files by burning copies into physical CDs or DVDs. Your virtual CDs and DVDs have virtual cabinets for organizing and easy tracking. You can share your files online. You can perform a simultaneous play of up to 23 virtual drives. DOO files are partial files of a disc image created using VirtualDrive, saving a portion of the total disc image together with other files such as .do1, .do2, etc., used when the total disc image has exceeded the size limit thereby splitting the volume into multiple files. The software runs on Windows.