[ggm]

Are you e.g. paying for Google one? I only ask because when I became a real customer I found the process a bit more solid than freemium.

You would hope your address book and some smarts could make a user specific greylist time delay on the spam, but I can also believe their email engine at scale struggles to apply this meaningfully.

[golden_abc]

Hi Yes, I paid, but seems it didn't help on this case.

And cause there are too many of the spams, they are filling up my Google Drive space quickly... I might consider to pay for a high tier...

[ggm]

Are you able to make a filter to automatically delete the mails? The Web interface in a desktop browser view has "filter messages like these" and you can select delete. That should stop your storage total being consumed.