This paper explores self-tracking as a social practice with significant relationships to human memory. The history of data and memory is fraught with a concern that specifics of qualia are subjugated to datafication. Yet, historical perspectives linking paper diaries and digital tracking show that rich accounts can be preserved in media. Cognisant of both perspectives, this paper argues that rather than delegating reflection to algorithms, users engage critically. Using original research data, this paper demonstrates how users unite the sociotechnical affordances of devices, data visualisations, and personal narratives to communicate memory in mediated forms. In doing so, they bridge semantic and autobiographic memory, combining subjectivity and objectivity. A datafied narration of everyday life emerges, affirming unique and vital stories. Often directed toward future goals, the mnemonic value of self-tracking in the present is overlooked. Yet whether recalling unfortunate accidents, sporting success, work, holidays, or illness experiences, participants use data as a scaffold to build stories and affirm identity. This paper asserts that memory and storytelling is an essential anchor for practices of digital self-tracking.