title: Cant use fopen in expansion folder on some Android devices
body: <p>Our game is bigger than 50Mb so we will be using an expansion file. This supposedly goes in the /Android/obb/package-name/ folder. To test it, we copy the file to that location using Windows file explorer.</p>
  
  <p>To find the location, we call </p>
  
  <p>String dir1 = Environment.getExternalStorageDirectory().getAbsolutePath();</p>
  
  <p>However, on some device, it cant find the file</p>
  
  <p>e.g. the GalaxyTab2.7.0 - the above call returns the location /storage/sdcard0, but it cant open the file /storage/sdcard0/Android/obb/package-name/base.tcf, even though we have copied it there, using Windows file explorer, to the Android/obb/package-name/ folder.</p>
  
  <p>Now, maybe this "Android" folder is not the same one as the storage/sdcard one - maybe I CAN only put it on an sdcard ? But this same thing works on Nexus 10 and Sony Experia device, with the same paths, which don't have sd cards in them.</p>
  
  <p>To get this working on other devices we had to put READ_EXTERNAL_STORAGE permissions in the manifest file. Maybe there is another permission ? Maybe once we actually download the expansion file, it will just work, but we can't test it otherwise.</p>
  
  <p>Any ideas?</p>
  
  <p>Thanks</p>
  
  <p>Shaun Southern</p>