Are A, B and so on on separate physical mountpoints? or different servers?
I am assuming there are A, B ... directories one place and then another set of A, B ... directories somewhere else. Maybe far away.
As a side note - if these directories and files change a lot rsync may not be able to complete everything in less than one minute, depending on topology. Hypothetically --- This means running rsync in asynchronous mode - start every minute whether or not the other job completed - may cause a backlog. In cases like that sometimes NFS is a better choice.
Note: if you used just B instead of /B it would exclude all directories named "B" even in other sub folders (eg /var/www/html/backup/Fri/B would also be excluded)
thank u very much for your answer my problem to be solve
but when i want to have same storage what way can i use for it i mean two storage sync together