Best place for external data files

[eluser]Unknown[/eluser]
Search in the forums didn't give me any results for this.

This is a question for best practice:
Where would be the best place to put external data files like csv-files I want to use in my application.

Put it in

Code:

assets->data->mydata.csv

or to the model wich will use this data

Code:

system->application->models->MyModel->mydata.csv

Looking forward to your suggestions

[eluser]xwero[/eluser]
I think the first solution is the most logical. Specifying the directory will limit the use and could lead to copying the file because you need it in another model. I would store the data files in the application/data directory