How to storage the safex coin in SafexWallet more safety?

The safexwallet i storage the coin inside, should i change the wallet every month or just storage inside?
i have look alot of post that ,if the hacker hack the server, than the users lost their all coin.

If the hacker hack daniel@safex.io servers, we would lost every things?

i storage my private key and the password in a offline harddrive, when i check my ac i will plug in and import my ac.

What is the most safety way to storage my safex coin?

SORRY FOR MY BAD ENGLISH

No, the safex wallet does not depend on the safex.io for the safety of your private key.