A method of managing stored data can include mapping data storage bins to a storage tier based on a bin access value associated with each data storage bin after a current time window ends, such that a first bin access value associated with a data storage bin that is mapped to a storage tier is greater than or equal to a second bin access value associated with a most frequently accessed data storage bin that is mapped to a next highest-performing storage tier, and when the data storage bin was not mapped to a current storage tier after a previous time window ended, determining a time weighting factor to be applied to an access frequency associated with the current time window, wherein a next bin access value associated with the data storage bin is calculated using the time weighting factor.