SourceTree checking File Difference between Local and Staged

Once we clone the remote repository, we can start making changes to the local working copy, once we are done with all changes in the local working copy, we will make to move the changes to stage before committing and pushing the changes back to the remote repository.

SourceTree will show the file difference between the local working copy and the stage/index copy, SourceTree will show the added/modified/deleted files between the local working copy and the stage/index as follows.
Newly Added Files

Modified Files

Deleted Files

Un-Modified Files