So today I invite you to go through your mobile, tablet and laptop, delete all the garbage, old/unnecessary pictures, apps you don't use anymore and music you don't like anymore. Save everything you may want to keep either in a memory stick, the cloud or your desktop, but keep it organised in different carpets (I like to organise them by year, month, place and date)-
It's going to take a while, you may want to give up, but it's worthy once you start having storage space, know where your photos are and you have music you actually like listening to. It's also going to become less overwhelming to go through as you keep using your phone. Try doing it every two or three weeks to keep everything in sync.

“Out of clutter, find simplicity.” 

Albert Einstein