I keep getting a backup notification stating that the maximum size has been reached. What does this mean? If it means my Google Drive, it is incorrect. I have plenty of space left in my Google Drive.
Try change this settings:
Mobile backup → Settings → Backup Restrictions → Maximum file size
Thanks, but I already had it set to “No restriction”.
Is it still an issue?
No, it was my fault. My Google Drive subscription had expired unbeknownst to me.