Copy RTI DVDs?

Hello, has someone copied the original Volvo DVDs for backup purposes and tried whether they work in the car? I stand before buying a new set. Mine are still on the 2003 level. The search gives only insufficient information. ICh does not find anyone who has really created a copy with a DL burner that works. I wonder if I should buy a cheap version from 2005 or really spend the good 300 € on the current version. I would just like to see the latter. If I could secure it somehow, it’s too valuable for me to be gone after a burglary.