Hi all. Recently, I have started recording a family event where I've had several pictures and a video sent to me in messages. For now, I have the pictures and video saved to my phone, but I'm starting to run out of space. I don't want to store these pictures and the video on a cloud service, for fear of losing them. Is there a device that I can buy for my phone that would allow me to store the pictures and video externally? I have the IPhone SE, second generation. Any help on this is appreciated.