Hi ELSA SAGE,

Thanks for reaching out. Yes it's possible to move from our Sage Business Cloud Accounting online software to Sage 50 Canada (a classic desktop install software*). Here's a blog with 6 Steps to move data or connect Sage Accounting to Sage 50 CA.

You will want to have both software subscriptions until the data transfer is complete, to discuss your options, feel free to contact our Sage 50 sales team at 1-888-261-9610.

Warm Regards, 
Erzsi