Hi, I am just setting up BT Sync. I have a directory that is already synced to various machines via Dropbox. In other words, the contents I want to sync are already synced and already on all the synced machines. Can I simply sync the non-empty directories in BT Sync? Will BT Sync recognized that the contents are already there and identical across machines? In other words, to simplify, say I have two machines A and B with directories called "dir" and in that directory a file called "file.txt". If I sync A\dir\ and B\dir\, will BT Sync recognize that "file.txt" already exists in the source and destination locations? How does BT Sync handle this situation? Thanks.