I apologize if this is a basic question. I have searched, but I may just not know how to ask it properly. I have designed a fairly complex shinydashboard which begins by loading an RData file as its datasource into global. This powers reactive selection boxes, charts, data tables, etc, which change day by day. What I have in mind now is to generate a series of dated RData files as source files, and then ask the user to pick a data file to load through the UI prior to rendering the rest of the dashboard. It seems like this should be a fairly simple thing to accomplish, but I am at a loss. Do I need to modularize my shiny app, or can this be accomplished in some standard way? Thank you for any help.