Backup and synchronization app. Synk is a backup and synchronization program that has the ability to resolve aliases and to archive older files. You can backup a folder full of aliases and modify your backup or synchronization strategy by dropping file or folder aliases into the defined folder. In addition, obsolete files and folders can be archived into a single folder, making cleanup and maintenance a snap. There is a complete log of Synk's backup actions. Obsolete files can be deleted, trashed, or archived.