I wouldn't use another device to finalize the disc just in case - it might work great, however something may go wrong and you've then lost everything. Try to see if a computer actually recognizes the disc when it is put into the optical drive. You might then get "Blank CD" however that doesn't necessarily mean that you've lost the data. Download and run ISOBuster software and see if the software recognizes the disc and if so try to retrieve the data using that. There are a few other CD/DVD/Blu-ray data retrieval programs out there that will do a similar job but ISOBuster is the most popular.