If you see a price of $2.99/month for a family plan, that is fixed —it won't jump to $9.99 next month. However, promotional offers like "3 months free" or "50% off for 6 months" are temporary, but the base price after the promo reverts to these fixed numbers.

Members cannot see each other's files unless they are specifically shared, maintaining privacy within the shared plan. Single Billing Point :