First, ensure that connections are correct, use another USB port/SATA cable, or use it on another PC. Without detection of the SSD, the result may require the SSD to be sent in to be professionally recovered as a result of a failed controller. You are also able to troubleshoot at the forum with the experts; these professionals can discuss your problems with firmware or do-it-yourself solutions before resorting to professional assistance.
For more help you may also visit here - https://forum.datarecovee.com/