If you have purchased a Ledger S Nano Wallet, you need to make sure of a couple of things. First, you will need a USB cable to connect your device to your desktop. Secondly, your device must be Windows 8.1, macOS 10.14 (64-bit), Ubuntu 20.04 (64-bit), or Linux. If you are using a smartphone, it has to be Android 8.1 or more. Ledger Nano S Wallet