All I can say that if you want to keep and safe funds or crypto, nano ledger is one of the good and the best for this things mate.
Only things you need to buy em in online in amazon, but if you don't want to buy em you can use Mew known as myetherwallet for crypto
or cold wallet if you want to save bitcoin.
Yes, nano ledger is another way to secure your coins because we are seeing many negative hacks about using low secured wallets. If you cannot able to buy, better store in MEW because we find more secure through this online web wallet.
You have so many options available to store your coins in. There are a number of companies who are in the business and they have introduced different kind of USB sticks that enable you to secure your funds. The devices have different capacity for storing the coins and are available at low price in the market. But you should do that only if you are not trading your coins.