Exceeding Storage Quota in Google Contacts
The PieSync Health dashboard shows the following error:
“Resource has been exhausted (e.g. check quota)” or “FBS quota limit exceeded” are other possible denominations.
What does it mean?
Google contacts has a limit of 25.000 contacts. If you exceed that limit, PieSync is not able to add contacts anymore. Keep in mind that the Other contacts and contacts in your "Trash bin" also count towards the limit.
If you still see PieSync adding contacts occasionally, despite seeing this error, it's because contacts that have been in the trash bin for more than 30 days will be deleted forever, automatically freeing up some storage room, allowing PieSync to add some contacts.
How can I solve this?
Make sure your Trash bin is completely empty. To do his, on a computer, go to https://contacts.google.com/trash
Potentially, clean up your Other Contacts folder. To do his, on a computer, go to https://contacts.google.com/other
Usually your contacts only take very little storage. It's shared across multiple Google entities. If your contact count is well below the 25.000 mark, the root cause of your storage problem is most likely located somewhere else.
This dedicated article provides more info on storage limits and how you can clean them.