When you are in “Run Mode” (i.e. when the 
button in the main toolbar is “checked”), each time you click on an output pin of an Action, Anatella creates the corresponding “HD Cache file” (and, Anatella also displays the content of the “cached” table inside the “data-preview” table).
Regarding “HD Cache File” and the “data-preview” table, the output pin of the 
WriteGel Action has a special behaviour: See section 5.26.2. for more information about this subject.