Backing up your data is the most important and effective way to troubleshoot hard drive issues like a pro. No matter how well you maintain your hard drive, there is always a risk of failure, damage, or theft that can result in data loss. Therefore, you should always have a backup of your data in a safe and secure location, such as an external hard drive, a cloud service, or a network drive. You should also backup your data frequently and regularly, depending on how often you change or add new files. You can use the built-in tool in Windows called Backup and Restore or other software tools, such as Macrium Reflect, EaseUS Todo Backup, or Acronis True Image, to backup your data and restore it in case of any hard drive issues.