On my Mac Harddrive (as in the main folder with Apps/Library/System/Users etc.) a few files and folders have appeared and I'm not sure what they are. There are two documents called ~fo-connect-little and ~server-lettle and 3 unknown folders called etc, tmp and var. I would like to know what these files/folders are and what they do. Also would it be safe to just send them to the trash or would they just come back? Thanks in advance.