I had an account before. I know that for sure because every time i was connected to the internet, it would always say "saving to outbox" and i checked files from time to time. One night, i just couldn't log in and had to make a new account with the same password and email. And now all my files are gone.
If you create a new account, you can access the Adobe Document Cloud storage for the new account only.
Your documents are stored in the Adobe Document Cloud under your old account. The only way to recover your old documents is to sign into your old account.
Hope this helps.