Hi I burned a DVD with Nero in Multissession, but I do not have access to the old data. This is normal in multissession? Thanks for the help.
The multi-session mode leaves the disc open for additional recording sessions on the original recording drive. That means that no other drive can read the disc because no table of contents has been written to it yet. Once the disc is finalized, then other drives will be able to read the entire disc and its contents.