A fifth option to back up your data is to use an online backup service. An online backup service is a service that lets you back up your data to a remote server, and access it from any device. You can choose from various online backup services, such as Backblaze, Carbonite, or iDrive, depending on your needs and budget. Some of them offer free trials or plans with limited storage space, while others charge a monthly or annual fee for unlimited storage. The advantages of an online backup service are that you don't need to worry about hardware, software, or network issues, you can back up your data automatically and continuously, and you can recover your data from any disaster. The drawbacks are that you need a fast and reliable internet connection, you may face security and privacy risks, and you may have to pay extra for more features or support.