Ok when I started on drop box about when It first came out was good.. Several Macs. later. and storage locations later. the directory of files on dropbox is significantly different then what the application shows. I have a limited number of files or folders then I want to keep on my local Mac because I need to keep the local files on an external drive. I think the difference was caused by the external drive being disconnected while the Dropbox application was open.. I only recently found out this is a bad thing. How so I "sych" up the list dropbox files shown in the application with what is in the cloud?