iPhone 6s Photos not backing up to iCloud
I have a 64 GB iPhone 6s and I signed up for the iCloud 50GB plan yesterday. Backup took a bit of time and completed successfully, however, none of my photos were backed up - the size of the backup was exactly the same as before I had turned on Photos backup. I had previous been on the 5GB free tier and therefore had not backed up my photos - but although I've upgraded, none of my photos are backing up. I've restarted my phone, reset wifi, turned iCloud backups off and on but to no avail. Please help.