Is the disk a CDRW/DVDRW as opposed to a CDR/DVDR
If it is a CDRW disk then is must be formatted first before you can use it.
With Nero and incd once it is formatted you can use it just like a floppy and drag and drop
I have only ever used Nero/incd for CDRW so I don’t know exactly what you need to do with pinnacle but there may be a function to format the disk.
Cant help with DVDRW as I have never used one
At least this will bump you up again.