FolderRAID

Real-Time Backup / RAID for folders: You define source folders, and for each folder target folders, i.e folders on different physical hard drive / network drive. When watching is on the process will run in background without interrupting you. i.e. When you create/modify a file a source folder it will be created/updated at the source folders target folders. Initialization process after defining the folders, you can run it one time for synchronization (you can copy the content the first time instead).

Requirements:

Java 1.7