Hey there, I just buyed my Trezor wallet and wanna know if i can store TaaS in it? (I didnt received it yet, coming in the next days).
You can
store TaaS in MyEtherWallet using Trezor to manage the private keys.
Best security at the moment, either can the image of the screen using your smartphones and store that file after the website or wallet is closed or just write the damn thing down and take a pic of that or keep the paper. The clipboard can be accessed to grab the data or the in/out stream for typing. Trezor is no doubt the best Bitcoin hardware wallet.