Improvements IO-API-for-Modules doc (fixes MovingBlocks#3654)

docs/IO-API-for-Modules.md

@@ -1,14 +1,14 @@
 I/O API for Modules
 =================
 
-To protect the user's system, you cannot use `java.io.File` directly, however a bunch of modules may need access to files. Finally, this feature allow modules to have **limited** access to files. Basically, there are two file operations allowed, `readFile` and `writeFile`, both of them works under the `Terasology/sandbox` directory. Take a look on the instructions bellow to learn how to use them.
+To protect the user's system, you cannot use `java.io.File` directly, however a bunch of modules may need access to files. Finally, this feature allow modules to have **limited** access to files. Basically, there are two file operations allowed, `readFile` and `writeFile`, both of them works under the `Terasology/sandbox` directory. This does not allow to create directories. Take a look on the instructions bellow to learn how to use them.
 
 1. The first step is to import and initialize the sandbox file manager where you need it, for this you can do the following:
 ```java
 SandboxFileManager sandboxFileManager = new SandboxFileManager();
 ```
 2. Second, create a consumer. We have two different types of consumers.
-* Read file consumer:
+* Write file consumer:
 ```java
 // put whatever you need here
 byte[] someBytes = new byte[2];
@@ -21,7 +21,7 @@ Consumer<OutputStream> consumer = outputStream -> {
     }
 };
 ```
-* Write file consumer:
+* Read file consumer:
 ```java
 Consumer<InputStream> consumer = inputStream -> {
     try {
@@ -46,4 +46,4 @@ sandboxFileManager.readFile("file.txt", consumer);
 sandboxFileManager.writeFile("file.txt", consumer);
 ```
 
-Finally, if you wrote any file, you can see them in `Terasology/sandbox` directory. :smiley: 
+Finally, if you wrote any file, you can see them in `Terasology/sandbox` directory. :smiley: