I want to create a directory on \"/mnt/extsd/MyFolder\" this path. while calling mkdir() it returns false.I inserted the sdcard on my tablet, got the external path as \"/mnt/ext
Do you have declared permission in Manifest.xml file?
Also I suggest you to not going for HardCoded path of /mnt/extsd/ Instead of it just use Environment.getExternalStorageDirectory().getPath().
/mnt/extsd/
Environment.getExternalStorageDirectory().getPath()