These little bars will keep in the fridge for up to5 days. Just store in an airtight container or wrap them up tightly before popping them in.
Cooked cheesecake also freezes really well, just place the bars fully cooled and uncovered on a pan in the freezer and allow to freeze entirely. Remove them and wrap fully in plastic wrap and aluminum foil till ready to eat. This method should ensure the cheesecake bars lasts3 months.