The Performance Optimization feature automatically consolidates disparate data and prepares invalid data for future use. It accomplishes these tasks with two very important SSD maintenance features: TRIM and Garbage Collection.
Performance Optimization can restore the performance of an SSD that is suffering from performance degradation after an extended usage period.
CAUTION: You should never remove the SSD during Performance Optimization. Doing so risks SSD malfunction and/or loss or destruction of data.