How to get absolute path of Internal Storage in Android

Environment.getExternalStorageDirectory();

Return the primary shared/external storage directory.

Note: don't be confused by the word "external" here. This directory can better be thought as media/shared storage. It is a filesystem that can hold a relatively large amount of data and that is shared across all applications (does not enforce permissions). Traditionally this is an SD card, but it may also be implemented as built-in storage in a device that is distinct from the protected internal storage and can be mounted as a filesystem on a computer.

File dir = Environment.getExternalStorageDirectory();
String path = dir.getAbsolutePath();