I can't back my photos up to Google photos. I have thousands waiting to back up and it backs up a couple and then stops and the icon starts circling saying, preparing to back up. They are going to start charging for storage in June so I want to back up before then. I lost photos last year as its was doing this and my sd card became corrupted. The problem has been carrying on for about 12 months. I've tried different WiFi and with WiFi turned off. Any advice?