I am very new to the agile software development and trying to understand the size rule to be followed when writing a valuable user stories
Scenario
I am currently involved in a portfolio data import projects. This involves setting a import and export functionality between the application and adapters. However the import/export functionality is implemented for couple of adapters. How will handle the user story of a new adapter - import/export setting. the functionality is same for all the adapters. I would like to clarify the below doubts 1. should we repeat the content of the user stories if the functionality is same 2. should we write more detailed stories or shorter one