Method #2: Using 3rd Party Software to Backup Your iPhone. Download Dr.Fone Backup and Restore from here. http://bit.ly/Drfone-Backup-Restore-iOS
Method #3: Backup iPhone to External Hard Drive or USB Drive.
Get Yours from the links below. Sandisk Wireless Stick. Buy from AliExpress. http://bit.ly/SanDisk-Wireless-Stick Buy from Amazon. https://amzn.to/2N0uaV7
Sandisk iXpand Pro. Buy from AliExpress. http://bit.ly/SanDisk-iXpand-AE Buy from Amazon. https://amzn.to/2QkBBEB