I’m in process of working through multiple older devices. My challenges so far have been forgotten passwords, not knowing picture/ video format specific to the

I’m in process of working through multiple older devices. My challenges so far have been forgotten passwords, not knowing picture/ video format specific to the device, locating the images/videos on the devices. I am in process of moving all images/videos to one location. Once done I will need similar offsite backup. Not there yet but I appreciate the insight into this final aspect of picture/video storage