The File Cabinet is a file storage mechanism which allows you to create folders, subfolders, etc. You can still control permissions on a per file basis.
To navigate to the file cabinet, click on Documents
Click on File Cabinet
To create a new folder, click on New Folder
Type in the name of the folder, and click Create
To upload files, click on upload files, or drag and drop your files onto the screen
To manage access, download, delete or rename a folder or file, click on the 3 dot icon
The manage access button allows you to choose who can view and/or edit folders and files