What do you do about info pictures etc on your phone when you get into a relationship? When would you worry about it?

I'm not near to getting into a relationship! But I am wondering. Like, on my phone now obv I got dating apps that I would delete. But I also have like a journal I keep that contains my thoughts. And a locked folder with pictures. I mean, I guess for a serious relationship this stuff could go but some stuff I might want to remember/look back on? But I'm pretty sure a guy is going to think you are cheating if you refused to show him? And my last boyfriend wanted to check my phone often and I didn't even have stuff like that then. But he would go mad if even a dating app advert came up!

What do you do about info pictures etc on your phone when you get into a relationship? When would you worry about it?
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