@LKLydia wrote:
I want to access a dropbox acount I created with my business email adress (which doesn't exist anymore as I don't work there anymore.
Unfortunately, if your forgotten your password or it's expired, or you're being sent a one-time security code, and you no longer have access to the email address registered with Dropbox, there's no way to access the account.
Your best option is to contact your former employer and see if they can restore your email account.