If you have local files that you want to add to Label Studio from a specific directory, you can set up a specific local directory on the machine where LS is running as source or target storage. Use this API request to get a list of all local file import (source) storage connections for a specific project.
The project ID can be found in the URL when viewing the project in Label Studio, or you can retrieve all project IDs using List all projects.
For more information about working with external storage, see Sync data from external storage.