Which wallet is good to store ERC 20 tokens for long time?
Desktop or Android based?
I think it would be safer if you use a desktop-based other than easy and use desktop-based wallet will also detail every detail detial submissions or acceptance in comparison with android-based.
For storing the ERC 20 tokens MEW has been the best wallet because it can support all the tokens but in the wallet based on android platform doen't give all toknes storage so you need to make sure that your token is supported by that wallet or you will lose your tokens permanently.So wallet with private keys are the best to store the crypto currencies.