Get list from storage and show in listview directly

I have an csv file . i want to save this file from assets to a hidden folder of mobile storage. Than i want to get specific list from this file and show in a listview.
۔ so how i can save veriable"create empty list" in storage same to same ?

Use the ASD to store the file
For each list use a separate csv file
An empty list is an empty csv file