1. A method of managing a synch operation during which business solutions entities are loaded into a mobile data store of a mobile computing device from a central data storage system, the method comprising: a) defining subscriptions identifying entities to be loaded into the mobile data store during a synch operation; b) estimating a remaining data storage capacity of the mobile data store; c) estimating a subscriptions data quantity corresponding to an amount of data space required to store the entities identified by the subscriptions; and d) comparing the subscriptions data quantity to the remaining data storage capacity.