Can I change my username
No. You can not change your username. If you absolutely have to use a different username you'll have to register a new account. NOTE: You will not be able to use the same email address as in your first account (so change that one to and address you don't use). You will not be able to carry over any history, like forum posts and status, to the new username.
It is Dropzone.com policy not to allow multiple accounts per person, so your initial account will be disabled. Any abuse of the site through the use of multiple accounts will lead to all usernames associated with a user being disabled.
By admin, in Account Help,
How do I change my password
Your password is saved in your Dropzone.com Account. All passwords are encrypted. To change your password login to Dropzone.com. If you are already logged in then click on the Account link in the top right corner of any page. This will take you to your Dropzone.com Account. From there click on "change your password". Type in your old password and your new password, confirm your new password by typing it a second time and click the "Update" button.
By admin, in Account Help,
I forgot my password. How do I retrieve it
Click on the Account link at the top of any page. From the login screen click the “Retrieve it here!” link. There are 2 ways that you to retrieve your password:
Enter your username into the area provided and click on the "Send Password" button. A temporary password will be sent to your email address on file. NOTE: The temporary password can be used ONCE only. After you log in, immediately go to your Account Home Page and change your password.
Alternatively, you can type your username, select your security question and type the answer you provided when you signed up. A temporary password will be displayed on the screen that you can use to log in ONCE only. Retrieve your password in this way if you do not have access to the email account on file anymore.
More about how Temporary Passwords work.
By admin, in Account Help,
How do I register or sign up
Click the Account link at the top of any page. Click on Sign up now! on the login screen. You will be prompted to enter a username, a password and an email address. You will also be asked to choose a security question and provide and answer for it. Please enter a valid email address that you have access to as an email will be sent to that address for you to activate your account. This is also where your temporary password will be sent should you forget your password. Your security question and answer provides you with an alternative way to retrieve your password should you loose it. Your password should be something that is easy for you to remember, but difficult for other people to guess.
By admin, in Account Help,