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Dedupe
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Contribute (Update)
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Sync (Two-Way Sync)
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Mirror
EXPLANATION
Dedupe is a Storage Technology which operates on a block
level to save storage space using pointers to data blocks. It is not a
file level operation.
Contribute / Update -> Updates Files from the Left Folder Path to the Right
without deleting any files or folders. Renamed, Modified and New Files and Folders are added from Left to Right.
Sync (Two-Way Sync) - New items, Renames, Modifications and
Deletions are synced from Left to Right and Right to Left Paths (both directions).
Mirror
- Copies and Overwrites all file and folder items from the Left Path to
The Right Path - creates a mirror copy from Left to Right File Paths.
Useful for Backups to removable storage such as USB External Hard
Drives.
SOURCE
https://en.wikipedia.org/wiki/File_synchronization