diff --git a/README.md b/README.md
index 49372d0..096d8ad 100644
--- a/README.md
+++ b/README.md
@@ -3,8 +3,28 @@ A plugin that has code that hopefully compiles and the game will load it to do t
 
 Requires Git (https://git-scm.com/), Premake5 (https://premake.github.io/), and MSVC 2022 (https://visualstudio.microsoft.com/vs/features/cplusplus/) to build.
 
-# What does it do?
-Nothing really right now, just detours and reimplements the entire GSC VM, for research purposes.
+# Features
+## FileIO
+This plugin provides FileIO interface to GSC for reading and writing files, this is exact to [CoD4x's](https://github.com/callofduty4x/CoD4x_Server/blob/master/scriptdocumentation/script_functions_reference.md#file-operations) interface.
+
+However, all reads and writes will take place strictly and only in the `scriptdata` folder.
+
+All files will be closed upon GSC restart (map_restart or fast_restart or missionfailed, etc).
+
+* `<int> FS_TestFile(<filename string>)` Returns `true` if the file exists, `false` otherwise.
+  ```gsc
+  if (FS_TestFile("test.txt"))
+  {
+    PrintConsole("Found test.txt!");
+  }
+  ```
+* `<int> FS_Remove(<filename string>)` Deletes the file, return `true` if successful.
+  ```gsc
+  if (FS_Remove("test.txt"))
+  {
+    PrintConsole("test.txt was deleted!");
+  }
+  ```
 
 # Installation
 Move the `t4sp-server-plugin.dll` to `%LOCALAPPDATA%\Plutonium\storage\t4\plugins\`, the plugin will be loaded when you start up a dedicated server for Plutonium T4SP.