Rupees are lost when you reset the three-day cycle, but you can deposit them in the Bank in West Clock Town. Any Rupees deposited will be saved across cycles. This is crucial for saving up for expensive items like sword upgrades or the Giant's Wallet. Always deposit your Rupees before playing the Song of Time. There are also various ways to quickly earn Rupees, such as winning mini-games or finding hidden chests, making it easier to replenish your funds after a reset.
