Left luggage jfk with new york stopover

Hi…an enquiry from a brit who is flying into jfk with the family and doing 3 nights there before flying down to orlando to do 18 days in Orlando. As we will have luggage to last us 3 weeks we don’t want to take it all into new york. Thus, can anyone give me information on left luggage at jfk. Have been trying to research but getting conflicting information. Thanks for any help. :smile: