Data logger for the smart storage experiment. The smart storage logger is a program developed to collect data about a user's activities. It monitors and records the files that a user accesses, used and available network connections, battery status and programs that are run. This data is then upload to hssl.cs.jhu.edu. This data is being used by the HSSL researchers in understanding how users use data and their devices in general with the primary goal of designing an algorithm to determining which files have the least utility and thus are the best candidates for deletion. Secondary goals include the design of an API to allow applications to register files that can be deleted automatically, designing an API to inform applications of storage pressure to allow them to take action, and designing a user interface to allow users to designate groups of files that can be deleted automatically. This will help users by simplifying storage management and enable applications to more aggressively prefetch and cache data as disrupting the user or other applications is no longer an issue.