I'm switching from an iphone 4 to a samsung galaxy someone gave me. I don't want to lose my photos. What can I do?

I'm switching from an iphone 4 to a samsung galaxy someone gave me. I don't want to lose my photos. What can I do?

Read more: I'm switching from an iphone 4 to a samsung galaxy someone gave me. I don't want to lose my photos. What can I do?