set your email (best is real one or a graal one where you wont forget the password) in the identify menu (menu - identify - identify by email or something like that). note you email in there and you will get an email sent requesting to approve that account. after that, simply hit the transfer button. you will now have 2 accounts - a "general" one and the old one. the old one should be reset and the general one can be accessed by every device you give permission to do so.
simply go to menu - identify - identify by email or something like that with the new device, enter your email and you will get an email again warning you that another device is requesting you to use that account. you can either accept or reject that request. if it is your device than approve it. now you can use the account with both devices. you can also revoke the access, so the access from all devices will be reset, except the one you revoked it with.
but watch out there are people wanting to log into your account to drop all items, so either keep the access personal (just for you) or only allow people you really trust to use that account. we cant and wont restore items for you if you got scammed