Make sure you logged into the same Gmail address on both your phone and the PC and turned the sync feature. This enables Google to store all the contacts you’ve saved in one device to be accessible from another if logged into the same Gmail account. And if you did, here’s how to export them all, or just a few selected ones; Also Read- How To Do Strikethrough Text in Gmail
Steps to Export All Contacts From Gmail Account into Your Computer
That’s it. The exporting of contacts starts into the selected format, which will be downloaded automatically and be checked.