How old are YOU that you haven't learned to back up your data?

not too young, too stupid, but not too young.

If these pictures were important to you, they should have been put on something other than your phone that could be easily lost or stolen. If your phone is your life, then your brother shouldn't have been in possession of it in the first place. It sucks, but YDI.

Not too young to get his ass whooped.

Passcode protect your phone, then take your merciless revenge

This is why you lock your phone.

Password, OP, password. I have a password for everything valuable because every single one of my younger cousins likes to go on my pictures and music and sh*t. Even the ones that are two months younger than me. I just don't let them get on it.

I thought he would have gone to the music if there wasn't enough space...that's what I do

People aren't being raised with concepts like common courtesy. You're a victim of the current trend of blithe selfishness. Stomp a mud hole in his chest so that he doesn't do stupid stuff like this in the future. He'll be a better person for it.

Use the cloud!