The Ledger Wallet is a cryptocurrency hardware wallet that lets the owner store his private keys on a USB-enabled device not connected to the Internet.
Hardware wallets are considered offline storage as they’re not connected to the Internet.
This makes hardware wallets more secure than software wallets, as hackers primarily try to access private keys and accounts that are stored online.
Ledger currently offers two hardware wallets, the Nano X and Nano S Plus hardware wallets.