Hello Gryphonr183 and welcome to community forums!
I'm sorry to hear about the issue you're experiencing with your Rescue and Recovery backup. It can be quite challenging when a backup disc is corrupt or does not write properly.
Unfortunately, if the Final C disc is corrupt or did not write, it may not be possible to recover the data from it. However, you might still be able to recover some data from the other discs.
I would recommend trying to use a different disc drive to read the Final C disc, as sometimes certain drives can read discs that others cannot. If this doesn't work, you might want to consider using a professional data recovery service.
For future backups, you might want to try the Lenovo Migration Assistant:
https://support.lenovo.com/us/en/solutions/ht509248-lenovo-migration-assistant-lma-helps-moves-files-and-ease-the-setup-of-your-new-pc
I hope this helps, and if you have any more questions or need further assistance, feel free to ask.
Best regards,
Jwes_Lenovo