Sync Groups provide greater security, control, and flexibility, and work with folders you already have. No copying or moving of files to a special folder is necessary.
Cloud as an Intermediate Folder
A Sync Group contains one or more device folders that get synchronized with each other. Also included in the Sync Group is a dedicated cloud folder that serves as the intermediate hop for movement of files across devices in that group.
The example below illustrates how Sync Groups work: Consider three devices, A, B and C, each with two folders.
Sync Group S1 (see figure below) keeps folders X1 and Y1 (on devices A and B, respectively) synchronized because they are used for a common purpose (the same project, for e.g.)
Files added or modified under folder X1 on device A get copied to folder Y1 on device B, and vice-versa. Similarly, files deleted from X1 get deleted from Y1, and vice-versa.
Consider another Sync Group S2 that synchronizes folders X2, Y2, and Z1 across three devices A,