My Anki is in the Apple computer, I click “Synchronize”. The computer is displayed on the computer. The result is that the apple phone and the Anki on Apple’s computer cannot be synchronized, it is more bitter.
You’ll need to reduce the size of your collection - please see Are there limits on file sizes on AnkiWeb? - Frequently Asked Questions
As a temporary solution, you can transfer your collection manually: Collection Transfer - AnkiMobile Manual