There are two methods to make backups:
- Full backup (recommended)
- Simple backup, to make clean updates
This method is very easy, all you have to do is copy all the files and folders where Nibbleblog is installed. All posts, pages, comments and configuration are in the folder content, themes are in themes folder and plugins are in plugins folder.
This method is more clean, because you only need copy the content folder. Remember if you are using themes or plugins from others developers you need to make a backup of them.