Sync mode not work

Hi!

I’ve two HD, one is a HD partition and the other one is a removable usb HD (B).
So, I need that these will be sync. Files in A will be the same in B.
But, if I delete a file/folder in A, CB do not delete it in B.

Why?
Thank you!
Ciao!

Locked.

Reason: Out-Dated post.

Josh