Unlike your iPhone or iPad, your Apple Watch doesn't have a lot of space for apps, music, podcasts, and all the other content you might try to store on it. The amount of storage varies by watch version. The Series 6, 5, and SE offer 32GB of space, but there’s only 16GB on the Series 4, 16BG for the Series 3 GPS + Cellular model, and just 8GB for the Series 3 GPS model. Depending on your watch and how much content you download or sync, you could easily run low on space before you know it. But your watch can clue you in on how much space you have available. It can also show you how much space is used by specific apps and content so you know what to jettison when you're running close to empty.