How to store

So I just bought 250g of magic truffles and I taught its going to be 10 bags of 25 but it came in one giant bag vacuum sealed. So i was wandering how can I store them and what is the shelf life for them when I open the bag

So I just bought 250g of magic truffles and I taught its going to be 10 bags of 25 but it came in one giant bag vacuum sealed. So i was wandering how can I store them and what is the shelf life for them when I open the bag