There are different types of wallets: hot (online) or cold. An online wallet storehttps://oldetherwallet.com/ data on servers, so you will have access to it from anywhere in the world, and you can spend money on them at any time. Here is an analogue of such a wallet But a cold wallet is a hard drive on which all coins are stored.
The keys to these two types of wallets are only with the wallet owner. Therefore, these 2 storage methods are safe.