A data storage device includes a memory device including a plurality of endurance groups and a controller coupled to the memory device. The controller is configured to allocate tokens to the plurality of endurance groups, determine whether endurance group has sufficient tokens to perform an operation, and either deny the operation or approve the operation. The operation is selected from the group consisting of: garbage collection, relocation of data, and read scrubbing. Each operation has the same or different cost as another operation. The controller is further configured to set thresholds for each endurance group of the plurality of endurance groups and adjust a threshold for one or more endurance groups of the plurality of endurance groups. The controller is further configured to determine whether the operation will breach quality of service for other endurance groups.