With what platforms is 1Pasword 2-step verification compatible

@HalfBekend

Google and Microsoft are examples in all likely hood. You would need to determine if the NAS is using a time based protocol or something proprietary. If the protocol is Time based, then 1Password can save and fill the TOTP.

1Password Support - Use 1Password as an authenticator for sites with two-factor authentication

Personally, I always save a copy of the QR code that is shown during TOTP setup, within 1Password, so that if I ever need to regenerate it again I can.

The principal reason a 2FA code doesn't work is that your computer's time is slightly off. 2FA codes are generated by your device using the current time, and they change about every thirty seconds. If your computer clock drifts/differs from the server, a wrong code will be generated. Another way to put it is with the clocks on your computer, and the server differs, and a mismatch in the 2FA codes occurs, resulting in an inability to log in.

In such a situation I would check and make sure the time is set correctly on your device. Does it automatically update itself? If not, try enabling automatic updating. I like to use https://time.is to check my device time. Nowadays, most all devices set their time automatically. However, hiccups still happen. I have had to toggle my "Set time automatically" settings from On > Off > On. Also, giving your device a restart may help alleviate any transient issues.