[Q] nexus 5 stuck in bootloop.....how to backup photos and songs before doing any res topic

i was playing coc when suddenly ma nexus 5 stopped working. the screen freezed , so i held the power button for some seconds to restart ma phonebut i think it got into a bootloop:(:( the google logo appeared and then the 4 dots came and it stuck there...:confused:i am running lollipop 5.0.1 and its rooted device .i just want to know how could i backup ma photos and songs??????plz helpp