My Other data on iTunes is inordinately large?

I'm pretty sure this is an error, can anyone confirm my suspicions? I have a 64GB iPhone, and my "Other" folder is taking up 15 GB of space? But I'm adding up all the data that is taken up by all my other things (Photos, Music, Apps, etc) and I just don't see how so much data can be taken up by other. I routinely delete my texts so that I can avoid this. Has anyone had a similar problem, can someone help me fix this?

Added (1). (If it wasn't clear… I have an iPhone!) :-D

Large Galaxy S8 or OnePlus 5 t is sogf

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