The present disclosure provides methods, computer readable media, and a system (the “platform”) for recall probability-based data storage and retrieval. The platform may comprise a hierarchical data storage architecture having at least one of the following storage tiers: a first tier, and a second tier; at least one computing agent, wherein the at least one computing agent is configured to: compute a recall probability for a data element stored in the data storage, and effect a transfer of the data element based on, at least in part, the recall probability, wherein the transfer of the data element is between at least the following: the first tier, and the second tier; and a graphical user interface (GUI) comprising at least one functional GUI element configured to: enable an end-user to specific a desired balance between at least one of the following elements: speed of data retrieval, and cost of data storage.