This paper proposes a new method for replication of files within a mobile adhoc network based on the prediction of the drift of the mobile nodes. The main feature of mobile ad hoc network is the dynamic topology. That is the nodes in the network are in mobile. To facilitate file sharing in mobile networks the only technique is file replication. Shared files are available at all times even if the owner of the file drifts away. The goal is to ensure that files autonomously maintain replica levels over time in a potentially dynamic and hostile environment. Also the proposed algorithm ensures that only those files are to be replicated which are about to exit from the network ensuring better efficiency and fewer overheads. Existing algorithms are simulated in Netlogo simulation environment and observations are compared with the proposed technique to check the efficiency of all algorithms. Copyright 2009 ACM.