Unable to write files on sdcard android

Question

I have an app which saves backup files on SD-Card. It works fine on HTC Nexus One, and other android phones, but with some phones it doesn\'t work (reading or writing).

Answer 1

Generally, Android wouldn't allow you to write a file directly to the SDCard's root. You must create a folder in the SDCard root, and then write your file inside the newly created folder.

Try this, and it should work.