You can always use the Lumi blockchain wallet as a multi-currency wallet for more than 1000 crypto assets or as a mono-wallet, for example - 300 Token wallet to safely manage all of your 300 Token tokens.
Lumi also provides 300 Token mobile wallet app for Android and IOS and web 300 Token wallet for all browsers.
Lumi 300 Token wallet gives you easy access to your 300 Token cryptocurrencies: