A method for backing a computing system includes generating a local history table of filesystem objects that have changed since storing a first backup of the computing system where the local history table includes attributes of the filesystem objects and a set of operations associated with changes to the filesystem objects. The method further includes transferring, from the computing system to a backup server, a second backup of the computing system, where the second backup includes a block level representation of a portion of a data storage medium associated with the computing system. The method additionally includes merging the local history table with a global history table stored on the backup server, the global history table mapping a history of filesystem objects to a set of block level backups of the computing system including the first backup of the computing system and the second backup of the computing system.