How to back up your Android phone without paying for extra storage

Backing up Android devices is quick, simple, and reliable, but there's a catch. The only cloud storage system that you can directly back up your Android device to is Google One, and this comes with a measly 15GB of free storage. This space fills up fast, especially if you're backing up lots of photos and videos. Soon, you'll have to pay for Google One storage, and while the prices are reasonable, this can still feel like a frustrating expense.