No matter how much storage you have, chances are you'll want/need more. Most people know to back up their data, but when was the last time you checked in on yours?
Go to Settings > Battery and Device Care > Storage
You can see how much space you have with your internal and external storage, as well as a breakdown with what's taking up the majority of your space.
Plus you can see if there are any duplicate files and which are the largest.
I managed to reach capacity with my Samsung device and my Google Drive... before realising I'm already backing everything up on another drive where I still have over 1TB of space left!
As I've gone through to look at the duplicates and largest files I've realised there's a lot of stuff I just don't need or want anymore, and I'm down to 88% full (with more work to do!) while my drive is just at 14%.
