SBC Mount (SyncBack Container Mount) is a free utility that mounts SyncBack Container files (read-only) to a drive-letter. This is so that files can be migrated from to a local drive, for example.
Support for SyncBack Containers was removed in SyncBack V9 and SBC Mount itself was removed from the SyncBack installer in V9.4.2.3.
It is not required by SyncBack and is only provided for backwards compatibility.