I'm trying to save multiple PDFs from the internet and only some of them are working. Here is my code for saving them: try {                         String extStorageDirectory = Environment.getExternalStorageDirectory().toString();                         File folder = new File(extStorageDirectory, "pdf");                         if (!folder.exists()) {                             folder.mkdir();                         }                         File file = new File(folder, item.getName() + ".pdf");                         if (!file.exists()) {                             file.createNewFile();                             FileOutputStream f = new FileOutputStream(file);                             URL u = new URL(item.getURL());                             HttpURLConnection c = (HttpURLConnection) u.openConnection();                             c.setRequestMethod("GET");                             c.setDoOutput(true);                             c.connect();                             InputStream in = c.getInputStream();                             byte[] buffer = new byte[1024];                             int len1;                             while ((len1 = in.read(buffer)) > 0) {                                 f.write(buffer, 0, len1);                             }                             f.close();                         }                     } catch (Exception e) {                         e.printStackTrace();                     }

This URL worked normally: http://www.homedepot.com/catalog/pdfImages/50/50a7bca4-2c2d-4688-913f-7852b25bdeec.pdf

This one failed: http://www.coastwidelabs.com/Products/MSDS/Grease%20Lightning%20SDS_Staples.pdf

The error I'm getting is Invalid Format when trying to open the file.

I've searched all over and can't figure it out. Any help is appreciated.