Looking for the best option to back up my photos and videos from my phone. Have always had micro SD in my previous phones so nit certain what my best option is.
Welcome to Android Central! I always recommend using Google Photos backup, since it's easy, automatic, and allows you to quickly free up space on your phone using the option in Google Photos (which will automatically locally delete photos on the phone that it knows have already been backed up to the cloud).
Also, if you have a Microsoft 365 Personal subscription, you get 1 TB of OneDrive space (or if you go with the Basic sub, you get 100 GB): www.microsoft.com/en-us/microsoft-365/onedrive/compare-onedrive-plans. Since Samsung integrates pretty tightly with Microsoft, this should also work well for you.