How to Store and Preserve Sliced Jamón?

A vacuum-sealed package of hand-carved Jamón Ibérico will last up to 4 months in the refrigerator.
An opened package, however, should be enjoyed the same day. Never freeze jamón.

Only sliced Jamón Ibérico needs to be refrigerated. Be sure you pull it out of the fridge about an hour before serving so it can come up to temperature.

Full Article:

https://www.ibericoclub.com/the-guide-to-storing-and-preserving-jamon-iberico/