Do you ever run through your phone storage?  

I like to take pictures and videos of interesting things around life. so the phone's memory is not enough to hold them. I usually buy hardware to store them and be more secure. you can try it out

I make a point to save all my photos and delete most of them from my phone. I never had an issue with missing out on storage this way. I think the closest I have come was maybe like 50% of my storage.

I never have had an issue with it but I don't do much on my phone. I have a camera that takes better pics and video than my current phone so I seldom use it for either of those things. I also don't download many apps.