said by NinjaAction:
I'm upgrading to Business 50 next week, planning on uploading a ton for backups and probably will continue doing 500+ gigs per month indefinatly.
Will I get charged?
I believe at this time you won't get charged, but going over could result in a phone call and suspension or requesting you upgrade your plan.
As I'm not a Shaw Business CSR, I highly suggest you call them for a definitive.