Photo Downloader stopping, with error message "Files were not obtained from device"

Hope someone can advise - I'm trying to copy off photos and videos from my iPhone 7 Plus onto my PC (Windows 10). I'm using the latest version of Bridge. The first time I tried, it stalled 60% through processing, giving me the error message seen above.
I came to the community to see others had a similar problem so tried the suggestions of resetting preferences/clearing caches etc. Rebooted the PC and had another go and it stalled at exactly the same place, on the 7946th file processed.
Can anyone suggest what the issue might be?
My iPhone is connected properly, so it's charging at the same time. My PC refuses to recognise my iPhone as a device to download the files through Windows' Photo Downloader or pull them out through File Explorer, so I thought Bridge was going to be my saviour....
And in a related issue, Bridge refuses to recognise my husband's iPhone 7 when it's plugged in. Why might that be when it recognises mine?
Any help/advice would be appreciated.
