Final answer:
Transfer files are typically classified into four groups to ensure an organized filing system: Active, Inactive, Closed, and Open, each representing the current status of the files.
Step-by-step explanation:
The four classifications for organizing transfer files are typically Active, Inactive, Closed, and Open. An Active file is one that is currently being accessed or used frequently. Inactive files are those that are no longer actively used but need to be retained for possible future access or for record retention purposes. Closed files are those for which the matter has been fully resolved or completed, and no further action is anticipated. Lastly, Open files are those that are still pending action or resolution and are currently being worked on or await further steps.