That Samuel appears to be in Yonkers in the 1920 Census too, so if the one you found in Manhattan in 1920 is correct, the one in Yonkers in 1930 probably isn't him.
For the Samuel who was in Manhattan in 1920, he is listed as being born in the US. However, since the information may not have come directly from him, I wouldn't be entirely surprised if it were wrong.
I don't see any other likely options for 1930 in the New York area. Do you know anything about how many children he had or if he had any other relatives in the US?