YOU SAID:

I don't know what this is supposed to do

INTO JAPANESE

これが何をすべきかわからない

BACK INTO ENGLISH

I don't know what this should do

INTO JAPANESE

どうすればいいかわからない

BACK INTO ENGLISH

I don't know what to do

INTO JAPANESE

私どうしたらいいのか

BACK INTO ENGLISH

I don't know what to do