Where to Check macOS, iOS/iPadOS, and iCloud Storage Status
There’s little more frustrating than running out of space, which always seems to happen at just the wrong time. Luckily, Apple makes it easy to check any time, before it becomes a problem. On the Mac, choose About This Mac from the Apple menu and click Storage. On an iPhone or iPad, navigate to Settings > General > iPhone/iPad Storage. For iCloud, you can look in either System Preferences > Apple ID on the Mac or in Settings > Your Name > iCloud > Manage Storage on an iPhone or iPad. Once you know how much space is consumed by what, you can more easily clear unnecessary data. If your iPhone or Mac is low on storage, you may want to check out their recommendations. If your iCloud account is low on storage, you can read about what to do here.
For some, the difference between your iPhone or Mac storage and your iCloud storage can be a little unclear. Your iPhone and Mac have chips in them that hold data, physically on your device. Your iCloud storage is in your iCloud account on Apple's servers which is always accessible as long as you have an internet connection. Depending on what it is, your Mac or iPhone can use your iCloud to augment your device's storage.

(Featured image by iStock.com/alphaspirit)