Are flashcard system actually more efficient than other ways of knowledge memorization? It never worked for me,I am curious to whether I'm the weird one or if t

Are flashcard system actually more efficient than other ways of knowledge memorization? It never worked for me,I am curious to whether I'm the weird one or if there's anything that can back help me understand if I'm using the system work. To me, just for the sake of having a data point down, summarisation in writing is how I remember stuff.