My iphone 4s is not updating or restoring after trying to update to ios 9?

My iphone 4s is not updating or restoring after trying to update to ios 9?

Added (1). I have tried updating with iTunes from my Macbook Pro, everything is up to date i made sure of that. However after extracting software it will continue to install it on the iPhone, and when it gets to just over half way, it will stoop in the exact same location overtime then i will receive an error message from iTunes saying "The iPhone could not be updated. An unknown error occoured (50).

How To Transfer Music From iPhone to Laptop iTunes?

So I get a laptop for school, and on that laptop I download music into my iTunes library off of YouTube. I always sync the music from my laptop to my iPhone 5s so I can listen to music on my phone as well.

My laptop gets wiped every year, and now my 200 or more songs are gone from my laptop. I had no idea that I was supposed to back them up from iTunes as well.

They're still on my phone, but not my laptop. How can I transfer my music from my phone to my laptop?

How To Delete iCloud Backup Photos?

So my iPhone 5s (iOS 7) storage is almost full. It has only 13mb left. On my device I only have about 300 photos, but I used to have over a thousand. I just transfer them onto my laptop, then delete them off of my phone.

Whenever I connect my phone to my laptop, it tell me I have 4000 photos.

How can I get rid of all those extra deleted photos?

How to do 2-page on iPhone IOS 9.0.1?

How do I do the thing where you can mess around with 2 pages at once on my iPhone?

Added (1). @Danielle Apparently. In the details of the update it said "No need for switching back and forth between apps with our new 2-page feature!".