File Number on Letter from Sydney, NS

[VIKAKUMA22]

I Received a letter from sydney, NS asking to submit the documents to Buffalo consulate. The Letter has a File number on it. My Question is:
Is this file number the AOR number or will I receive it from Buffalo?
Secondly, How long is the process taking from buffalo visa office under the new rule? I understand that each case is different but still some rough idea.

Thanks