@ringogli1 ...

Are you trying to import your Moodle course into a Free For Teacher (FFT) course?  Or, are you trying to import your Moodle course into a paid Canvas environment?  If you are using a FFT environment, those courses have a 500 MB limit.  If you are using a paid Canvas environment via your school, you'll want to check your course "Settings" screen to see how much available storage space you have in that course.  See the section called "View File Storage" in this Guide:

How do I set details for a course? - Instructure Community (canvaslms.com)

How much storage space is listed in your course?  If it is less than your Moodle file size, then that is most likely the reason why you cannot import the Moodle file into your course.  You would need to speak with your school's Canvas administrator or someone from your school's Online Learning / eLearning / Distance Learning department to discuss if increasing the course size is a possibility.

Hopefully this will be of some help to you.  Good luck as you have these conversations with folks at your school.  Sing out if you have any questions.  Take care...be well.