I am looking for information about interacting with the local file system from an Extension Builder Plug-in. Specifically, I am looking for the ability to lock folders and files. If that is not possible, then I would like to be able to change the permissions on a folder or file. I need to the ability to not allow a user to browse the file system to the folder and then go about messing around with its internal file/folder structure. I am fairly certain the Plug-in can read, write, move, delete files/folders from the file system; however, locking a folder/file, doesn't appear possible. I hope there is enough detail here to describe what I'm trying to do. If not, please let me know what additional information may be necessary. Thank you, in advance, for any information that can be provided.