Time machine backup since Catalina
I upgraded to Catalina yesterday, and when my Apple Time Capsule (3tb) commenced a backup, it appeared to want to backup my entire system, approximately 450gb. I stopped it as it didn't seem right, but each time it wants to start it seems to want to backup my entire system.
I have about 500gb space left on the device so it has capacity, but it doesn't seem to want to pickup from where it left off prior to the upgrade.
I can see previous backups, eventually, it takes a while to show them, and i have to click on 'yesterday' and 'today' a few times for them to show. And it does appear to be able to verify backups - although i have had a network error from time to time which i did not have before. I am just running another verification now to be sure.
I have read many posts and i'm not sure what to do - if i leave it to do the whole backup it will take up loads of space on the time capsule - will it eventually pick up from where it left off?
Thanks.