Need tips on how to fix a spoilt sata hdd drive

Hello fellow techies. I need help regarding my external hard drive which just suddenly stopped working. I already tried all tricks I know to repair it, and even tried to replace the same type of board but still nothing worked. Does anybody know other tricks on how to fix a spoilt sata HDD? Or even just to at least get the files and transfer it to another HDD. Please help me.
