2GB is free initially. Then there have been all sorts of ways to get extra free space, some of them with time limitations.
Maybe the email means the extra.
Backup the few Megs somewhere else.
I saw a Cautionary Tale recently.
Someone found they were locked out of their account with one of the reputable hosting companies.
The company is refusing to unlock it for some reason and so the data has effectively been lost (no other copy).
While it was considered possible that companies might go bust, or some data get lost or corrupted occasionally, being deliberately locked out on a Cloud storage account was not on my radar.
It's obvius in retrospect it's a possibility for hacked accounts and disputes.