What is Ledger Nano S
The first time I saw one of these I thought it was a USB stick as they have the same shape and size! This small device is a hardware wallet that uses cryptography to store and secure specifically supported cryptocurrencies.
The wallet connects to your computer using a USB cable and can be used to send or receive cryptocurrencies once you have set it up for the specific crypto of your selection. See below an awesome short video made by Boxmining on how to setup your Ledger Nano S hardware wallet.