The current proposed design of the replication sites as discussed in the previous sections requires installation of data storage devices in Hilo, Cambridge, and Nankang. At the primary site in Hilo, we should consider both temporary and long-term data storage to hold at least few months worth of the maximum data rate. At Cambridge and Nankang, each should have a mass storage device to hold about 1 to 2 years full operation data. In the future, if all the SMA scientific data need to be available to the wider astronomical community, the Cambridge and Nankang sites are likely to become science data center and may need to increase storage capacity.