There are two ways you can add files to a project:
Procedure
To add files to a project from the file system:
You see the Add Files to Project dialog box where you can access files in any directory.
Result
The SAP@Web Studio adds the files to the project directory.

To add files to a project, you can also use the Copy, Cut, and Paste functions in the standard toolbar.
If you delete files, they are removed from the project, but not from the underlying directory.

Always use the SAP@Web Studio interface to add files to a project. Adding files directly to the underlying project directory may result in inconsistent services.