Lazy Mirror is described as 'Copies changes made to one or more sources and archives the previous versions of the copied files. If all storage allocated to a destination has been consumed, the oldest archives will be disposed off to make room for new files' and is an app. There are eight alternatives to Lazy Mirror for a variety of platforms, including Mac, Windows, Linux, BSD and Google Drive apps. The best Lazy Mirror alternative is rsync, which is both free and Open Source. Other great apps like Lazy Mirror are Backer, Copywhiz, RsyncOSX and Truck - Rsync Client.