Update sys_save_load.md

examples/file/sys_save_load/sys_save_load.md

@@ -3,3 +3,5 @@ title: Save and Load
 brief: This example shows how to save and load data using sys.save() and sys.load()
 scripts: sys_save_load.script
 ---
+
+The example will save and load a file containing a Lua table with a single value key-value pair representing a highscore. Loading and saving is done using sys.load() and sys.save(). Also refer to the [Working with files manual](https://defold.com/manuals/file-access/).