Backing up computer data is universally recommended. When disaster strikes, people are relieved ... they think .... because they have a BACKUP. But you are not out of the woods .... yet.
Unfortunately, many who faithfully do backups have never once attempted to do a "restore from backup" to make sure that function also works. Often, the first time a "restore" is attempted is following a disaster. At this time some folks learn all those backups they faithfully made are worthless because there is something wrong or missing with the restore process.
If you make computer data backups, periodically test your ability to restore them as well.