To get everything seamlessly backed up to the cloud, tap your Google account profile picture (top right), then Backup. Turn ...
Traditionally, if you wanted to transfer photos taken on a camera to a computer, you have a couple of options. One of which is connecting your camera directly to your computer and accessing the files.
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.