Saving data in Unity - 1 File for 1 Level?

Hey guys,

how do I save data in Unity correctly? The easiest way for me would be to save every level I have in an own file. But I don't know if this is incorrect or not recommended. I don't have to pass the data between the scenes so I thought I could go the easy way. On the other hand this creates a lot of files on the users device. But passing a dictionary is more trouble than I may need.

Btw I followed this tutorial:
http://unity3d.com/learn/tutorials/...ining-archive/persistence-data-saving-loading

Thanks for advise!