Update Readme.md

Author: codingbychanche

Readme.md

@@ -1,12 +1,12 @@
 File Dialog Tool
-----------------
-File Dialog Tool is an activity which alows browsing the file system of your
+================
+File Dialog Tool is an activity which allows browsing the file system of your
 device and pick file paths for loading or saving data.
 
 An example of how to use this library in your own project can be found here: [Example app mainActivity](app/src/main/java/berthold/filedialog)
 
 Screenshots 
-=========== 
+-----------
 
 ![](2.png)
 
@@ -21,7 +21,7 @@ When called with 'save- file' option, a floatig action button to do so is displa
 Preview feature.
 
 Import this library into your own Android Studio project
-========================================================
+--------------------------------------------------------
 The first step is to prepeare your Android Studio's 'build.gradle' files (Project level and module level).
 
 <b>Project level</b>
@@ -41,6 +41,15 @@ In the example above the 'SNAPHOT'- tag is used to download the latest version o
 check for the latest release under the 'Relase' tab of this repository and use that instead to 
 import a stable release.
 
+Permissions
+-----------
+Add the following permissions to your app's 'manifest'- file:
+
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission>
+
+Before starting the app for the first time on your device, you need to set the app's permission to access
+internal memory (got to settings => app => permissions).