More responses inline :
How could I add a new file ?
The code on CVS does not have this feature yet.
Is there a plan to add the capabilities (aka actions) from file-storage folder chunk, or is it just for viewing files ?
Yes, I have plans to add sorting, adding, deleting, copying and moving of files and folders.
What is your current use case ?
The intention is to develop a user interface that mimics windows explorer. The package will initially allow you to view files and folders but I hope to be able to integrate the other file storage actions soon.