I apologize if this question is unfocused. I don't use my phone a lot.

I have a Samsung Galaxy Note 9. I'm going on vacation and plan to take lots of pictures and record a lot of videos (for my standards at least).

I'm currently using 50 GB of 128 GB of internal storage.

Is the solution to buy a large SD card and change the settings to save pictures and recorded videos there?

If so, how large should it be?

Thank you.