Template

SD-Card-(DEV).md

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 ## About
 
-Reading and writing to the SD Card is a great way for your application to save progress or reference data that might be to too large to fit in the firmware. Below are examples on how to interface with the SD Card using the Mayhem code base.
+Reading and writing to the SD card is a great way for your application to save progress or reference data that might be to too large to fit in the firmware. Below are examples on how to interface with the SD card using the Mayhem code base.
+
+## File Class
+
+Most of the heavy lifting for working with files on the SD card is done by the [File](https://github.com/eried/portapack-mayhem/blob/next/firmware/application/file.cpp) class. This helper class which simplifies the `FatFs - Generic FAT file system module` which can found at [`firmware/chibios-portapack/ext/fatfs/src/ff.c`](https://github.com/eried/portapack-mayhem/blob/next/firmware/chibios-portapack/ext/fatfs/src/ff.c). Below are some examples on how to read and write files to the SD card.
+
+### Directory(s)   
+
+### Create File
+
+### Read File   
+
+### Write File  
+
+### Delete File   
+
+
+## Wrap Up
+
+### ui_newapp.hpp
+
+    #include "ui.hpp"
+    #include "ui_widget.hpp"
+    #include "ui_navigation.hpp"
+    #include "string_format.hpp"
+
+    // Add this to include the File Class.
+    #include "file.hpp" 
+
+    namespace ui
+    {
+        class NewAppView : public View                                // App class declaration
+        {
+        public:
+            NewAppView(NavigationView &nav);                          // App class init function declaration
+            std::string title() const override { return "New App"; }; // App title
+
+        private:
+            void update();                                            // Function declaration
+            MessageHandlerRegistration message_handler_update{        // Example, not required: MessageHandlerRegistration class
+                Message::ID::DisplayFrameSync,                        // relays messages to your app code from baseband. Every time you 
+                [this](const Message *const) {                        // get a  DisplayFrameSync message the update() function will
+                    this->update();                                   // be triggered.  
+                }};
+        };
+    } 
+
+### ui_newapp.cpp
+
+    #include "ui_newapp.hpp"
+    #include "portapack.hpp"
+    #include <cstring>
+
+    using namespace portapack;
+
+    namespace ui
+    {
+
+        NewAppView::NewAppView(NavigationView &nav) // Application Main
+        {
+             // App code
+        }
+
+        void NewAppView::update()                   // Every time you get a DisplayFrameSync message this function will be ran
+        {
+             // Message code
+        }
+    }
+
+