Baked potatoes wrapped in foil should be properly cooled and stored if left over. I recommend that they be taken out of the foil and stored in a metal or glass pan, then covered with cling wrap or foil, once they have cooled down to the refrigerator temperature. To reheat, uncover and bake at a lower temp, 275 degrees F until the internal temperature is 185 degrees F.

Note these cautionary posts:

• Food Safety
• Eating Left-Over Potatoes

And some other suggestions for doing a twice baked potato: What to do With Leftover Baked Idaho® Potatoes

Or other baked potato questions: All Things Baked Potatoes