Information About iCloud and it’s troubleshoot

First of all you need to know about what is iCloud and how it will going to work with your device before knowing about it’s troubleshooting.
The iCloud is a place where you can keep any of your files from your iPhone, iPad, iPod touch, or Mac. You can back up your entire iPod or iPhone onto the cloud. You can access iCloud on and iPod or iPhone when you are connected to a WiFi signal, however when you are on a computer all you need is an internet connection. You can access files that you put on the cloud from an apple phone or iPod and on your computer. Access your content on all your devices. Share photos with your favorite people or track down a missing iPhone, iPad, iPod touch, or Mac. Whether you have one Apple device or five, iCloud takes care of everything.
Simply as known as iCloud is a bunch of servers where certain amount of space for you to save your data without using up your own memory.
It backs up all your stuff in case it gets stolen or something. You choose the stuff you want it to protect and it keeps a copy of it all. So you don’t loose anything.
1) How to setup an iCloud Account
a) Make sure that your device is running iOS 5 or above than iOS 5.
If you have not then just connect your device to your Mac or PC and follow the onscreen instructions in iTunes. (Requires iTunes 10.5.)
b) Turn on iCloud
Follow the onscreen instructions to activate your device and set up iCloud.
If you skipped the setup process or want to change your iCloud settings, tap the Settings icon on the Home screen and select iCloud.
c) Customize your settings.
Tap the Settings icon and select iCloud. Tap the On/Off switches to enable individual iCloud services, including Photo Stream, Documents, Find My iPhone, and more.
To enable Backup, tap Storage & Backup, then switch on iCloud Backup.
d) Enable automatic downloads.
To enable automatic downloads for your music, apps, and books, tap the Settings icon on the Home screen and select Store.
e) You may need to verify the email address that you use for your Apple ID.
To Verify, Simply follow the link in the verification email that says “Verify Now.” Sign in with your current Apple ID and password, then click Verify Address. You can also verify by signing in at My Apple ID. You’ll receive an email prompting you to verify.
Some problems may occur 
Sometimes saved data on iCloud may took up all the space on iPhone. It’s not even letting take pictures anymore. It does When you activate iCloud on your iPhone it stores your content such as pictures, apps, notes, etc remotely, but the disadvantage is when you use up all the space.
I would suggest that you buy more space or control some of your apps from storing everything in the iCloud platform.
Go into your settings and deactivate some of your apps that you hardly ever use from storing content.
Once you backup your content in iTunes just go into settings and disable some of your apps from automatically storing data in your iCloud account.
Following this step.
Step 1: go to setting>iCloud
Step 2: every app that is on turn it “off” that you don’t feel a need for it to be stored.
Step 3: I suggest backing up your content on your iTunes account before proceeding with step 1 & 2.
Once you free up some of your apps your iCloud should free up and you should be able to store content again without it freezing up.
Usually apple will send out a notice telling you that your space has reached it’s maximum.
Finally u don’t get charged again u just download the songs from your device without having to pay again and if you need some more space you must buy a bigger online storage on iCloud.