Step1. Launch Partition Assistant, in the main console, right-click the partition which you want to delete, select “Delete Partition”.
Step2. In the pop-up window, select the method to delete partition and click “OK” to affirm you want to delete partition.
Step3. Then back t\o main console, click “Apply” on the tool bar to commit the operation.
You could also quick clear hard disk with the feature “delete all partitions”.