How to restore an iPhone, with out everything being new?

Please someone help, i need to restore because there's no more space but i don't want to start new…

The whole point of restoring your phone is to delete everything… -.

Restoring will erase everything. Back everything up to your itunes then after you restore it you can just load all yours apps, music, and pictures back on your phone.

You can make a restore backup point for your iPhone in iTunes, but this means all your settings and things will be restored so a fault in your settings will not be removed.