Wasabi trial accounts have a 1TB limit. More information can be found here on Wasabi's knowledge base.
VM Backup offsite backups will fail with the following error message:
The offsite backup operation encountered an error. (Error code 'OFFSITEBACKUPCONTROLLER_036')
System or application error details:
Your account has surpassed its storage limit.
System or application error details:
The remote server returned an error: (400) Bad Request.