Right now the backup tool just takes 2 directories and an optional granularity value. It doesn't accept other control args. Extend the script to take args and add support for these initial two:

1. At the moment it is quite chatty and with large tables that can be an overwhelming amount of output that isn't useful. Extend the tool to take a --verbose or -v (or maybe the opposite --quiet and -q) argument.
2. Also extend the tool to take 1M, 512K or some other non-integer form of granularity size.