Ledger recently updated it's devices. You now can store even more crypto assets than before. A ledger nano s (https://amzn.to/2MMwo7t) can store the following stablecoins:
- Tether (usdt)
- usd coin (usdc)
- Trueusd (tusd)
- Stronghold usd (usds)
- Kowala (kusd)
- Usd synth (susd)
- Mether (usdm)
- Statis eurs (eurs)
- DAI (dai)
Here you can find a list with all supported crypto assets on ledger hardware wallets: https://www.ledger.com/pages/supported-crypto-assets