Illustrator is a vector graphic editor that can be used to create illustrations, logos, and other graphics. It can save data in a number of file formats, but the Native File Format (NFX) is the most popular and widely used. NFX is a format that was created by Adobe Systems Incorporated and it is designed for illustrator files. It is an open source format that has been adopted by many software companies. The main advantage of using NFX over other file formats is that it preserves all the data in an illustrator file. This means that you will not have to worry about losing any important information or accidentally deleting something important. Another advantage of using NFX is that it supports multiple devices. This means that you will not have to worry about whether or not your illustrations will look good on different devices such as computers, phones, or tablets.