9 hours for a folder to sync (50%, so ~18 hours total) with Google Drive. Yes, client_id exists.
No worth to use google drive sync...
*edit i think my laptop was in sleep mode because the last folder (same size and same number of files) took 1 hour but i cant confirm that. 1 hour is a fair
If this is for backing up then you could use restic with rclone. Restic glues small files together to make larger files which might help. The restic chunks are still quite small though so it might not help that much.