I just have some new thoughts about the handling of file deletion and undeletion in the 2010s. The key points are: (1) ALMOST NEVER DELETE DATA PHYSICALLY. Today's new computers usually come with 500GB+ disk space, so deleting files to save space is less and less a necessity. So a new Recycle Bin concept could always preserve deleted files physically until there is really a space shortage or the user intends to permanently eliminate private information immediately. (2) FOCUS ON THE REASON, INSTEAD OF THE DATA. Sometimes we have a reason to delete a file or folder, but later we have a new reason to recover it, and later we may have a new reason to delete it again... We humans are not used to reviewing all possible reasons for deletion and undeletion all at once. So I think the role of the Recycle Bin should be a journal for the user to record his reasons, from time to time, for a file/folder's "deletion" and "undeletion". For example, a user may like a game, movie, song or other type of content at one time but wants to delete it at another time but later wants to recover it. It's really all about his reasons to hate or like the same content over time. It's really about the user's scoring and commenting about a file in the file system, rather than the file's physical necessity to exist or not. If the user gives a file a very low score and a comment about why it's so undesirable, the file can be hidden in the Recycle Bin. If the user later has a mood to recover it, the user will be shown his previous comments about this file and determine if he really have new, good reasons to undo his previous decision.