The Ledger Nano S and Ledger Blue are two hardware wallets - physical cryptoasset wallets - produced by the leading player in cryptoassets security: Ledger. Ledger’s technologies enable cryptoasset holders to secure their private keys offline, what is known as cold storage. Ledger users can interact with their funds and carry out cryptoasset transactions through the Ledger Live application, an interface that standardizes and regroups each cryptoasset wallet on one app. Ledger’s technologies are today by far the most efficient and secure storage system in the world.
Ledger Nano S and Ledger Blue rely on the same underlying technologies but differ in the user experience they provide. While the Nano S’ screen use is limited, Ledger Blue’s format allows enhanced navigation through the device’s screen.
You can find a tutorial installation here.