To get everything seamlessly backed up to the cloud, tap your Google account profile picture (top right), then Backup. Turn ...
Using an external drive requires more effort than backing up everything to the cloud. You need to wait for your files to transfer from your device to the drive, and then sort everything into folders.
Backing up your files, ideally in multiple locations, is essential if you don't want to lose any data. Your documents, images, and videos can disappear if anything happens to your computer. It's also ...