The present invention provides a methodology of organization of control over the process of space or other quantitative parameter of resource allocation in computer data storages. More specifically, the present invention organizes areas of quoted space or time. A method and system of the present invention includes an establishment of quotas for an area of a file system that takes into account the belonging of a file to a certain subtree or subtrees of the file system. The quota management of the present invention is established within a usual computer system which includes a hierarchic file system, as well as a set of unique users, that could be united into groups.