If you're picking up your cake, transport it in a cool, air-conditioned vehicle away from any loose objects. Keep the box level at all times and always store it upright. When you arrive at your destination, store the cake in the box in the fridge. Try to keep it away from direct sunlight, moisture and heat when not in the fridge. Take the cake out of the fridge 30 minutes before serving and serve at room temperature. And remember, pick up and carry your cake box from the bottom only!

The honest answer is it's completely up to you! We personally like to abide by the Quality Cake Company's guidelines on how to cut a round cake.(https://qualitycakecompany.com/2020/04/28/cutting-a-round-cake/)

Our buttercream cakes will last for 3-4 days in the fridge if kept in an airtight container, or for up to 4 months in the freezer. To freeze your cake, wrap well in cling wrap, either whole or by the slice, and place it in an airtight plastic container or airtight resealable bag. Cakes with cream and fruit will last 1-2 days and should not be frozen.