Not enough space on the disc
The destination disc does not have enough space to store all the information being written to it.
To avoid this error, try one of the following suggestions:
Check disc capacity
Since discs come in different information capacities, ensure that your destination disc is at least as large as the source disc.
Note: The amount of data you can actually record to a disc will be somewhat less than the full capacity of the disc.
Delete files from the recording project
Remove some files from your backup, then try recording again.
Note: A minimum amount of data must be written to DVD+R DL discs to ensure compatibility with a wide range of disc drives. Up to 1 GB of space may be lost when writing the first session of an appendable DVD+R DL disc.