On the one hand, not every blank disc is compatible with every recorder. On the other hand it is possible for dirt from the atmosphere to get into a recorder, which is not sealed in the same way as the disks in a hard disk unit. The Verify option allows you to check the data you have written quickly and easily. It is particularly useful when backing up very important data. You can use the option to make sure that you can restore all the data in the event of a system crash. It would be disastrous to find out only after the system had crashed that there were faulty sectors on your backup disc or that the files had not been written correctly. If you use the Nero Verify function at the end of the burning process, you can be sure that the disc can be read and that all the files have been written correctly.