How to save my photos onto icloud?

I have an Iphone 4s and have almost 3000 photos on there! This has totally taken up my storage and can't even take a photo now. I'm going to save all the photos onto my laptop and delete a load off the actual phone but because I've had my last lappy crash and lose all my photos on it before I'm super wary and so I'd like to save them some other way too. I didn't really understand what icloud was but I'm told you can save all/music and photos on it. Is it private? Can only I see my pics on it? And how would I go about setting that up and putting my photos onto it?

Ok what you need to do is go into your apple account and enable icloud. It is very secure and you would be the only one able to access it. The only problem is that the free version only gives you 5GB which frankly is not enough memory to store 3000 photos. If i were you, i would invest in an external hard drive.heres a hard drive i would strongly recommend.

http://www.amazon.com/...006Y5UPZU/