title: ES File Explorer can read and write to external sd cart but my program cannot? (android kitkat)
body: <p>Android ES file explorer can read and write in my tablet that OS version is kitkat ,ES can create folder, files and copy and delete in my external SD cart.</p>
  
  <p>my application can write and create folder and files to internal storage but got error "Permission denied" for write in external SD cart. my app works on other version of android for write to external storage,
  now my question is how to write external storage in kitkat like ES File Explorer?
  my external storage is removable SD card.
  (my tablet is not root)
  sorry for my english</p>