What are the extra files on the Windows Drive?
Some files on the Mac contain supplemental information that is associated with the file. While the Mac can keep these associations intact, other operating systems (such as Windows) cannot since they are not built to understand such supplemental information. In an attempt to make sure that a file that is copied to another operating system and then back to a Mac, doesn’t lose that supplemental information, Apple added a feature to the operating system whereby the supplemental information is split out of the file and saved to a separate file with the same name but with a “._” added to the beginning of the filename. When the file is copied back to the Mac, the “._” file is automatically merged back into its associated file. This automatic splitting and merging is done by the Mac operating system itself, and is not something that ChronoSync has control over. These “._” files originally contained just the resource fork of files on the Mac. However, with Mac OS X 10.
