It is important to check the backup to make sure it works. You don’t want to be spending days, weeks, months, or even years making backups only to see when you really need it; it id not work! Most certainly, you will feel indescribably frustrated. You know you need data backups because data loss simply happens because computers are machines, a complex system of electronic components strewn together by wires & connectors. Even nature can cause data loss. Anything can happen so you had best be prepared for it by doing data backups & making sure that the data backups work perfectly. Without backups you will have to resort to data backup specialist & they don’t come cheap.