Two-factor authentication (2FA) that uses the authenticator app method can be backed up by storing the setup key. However, the best way to protect against a lost sign-in 2FA is to set up a Master Key and store it in a separate location and device, or by using a Hardware Security Key instead.
Funding 2FA and Trading 2FA do not need to be backed up because they can be changed by using sign-in 2FA.
If you did not write down or copy the setup key during 2FA setup, you will have to setup 2FA again in order to copy the key.
Store your authenticator setup key like you would a password
We don't recommend storing it digitally.
If not securely stored, the setup key can be compromised and used to gain access to your account. Furthermore please do not share your setup key with anyone, including our Support team.