Does Gmail calculate email storage per plus sign or alias address?

Question

With Gmail you can arrange additional address aliases by appending + and any arbitrary string to your original login.

Example:

• original account: [email protected]
• sample aliases: [email protected], [email protected], etc.

Do messages sent to an alias address add up to the original account's storage limit,
or by working with aliases can one get some additional storage, say: 2GB per alias?

Answer 1

Alias = mirror of the original or main email address. Therefore the disk space is shared between the two.

Good explanation over here.

An alias is essentially just a nickname for a mail account. The alias itself has no mailbox and all mail sent to it will be delivered to the mailbox it is mapped to.