Our daughter sends my wife (iPhone X) and me (iPhone 7) both copies of photos and videos.  Videos downloaded from both phones are identical so I can weed out duplicates with a program.  But photos download differently from her and my phones.  So I have to manually remove duplicates.  I know the photos are identical because if I hardwired download them I get identical files.  Also odd, neither my wife's or my downloaded photos are identical to the hardwired download file.  But video files are identical regardless of which phone or download method I use.

I'd much rather use the app to download photos but manually removing duplicates is too much work.

I have the Windows Desktop and IOS app purchased from the App Store.   

2 questions:

1)is there a way to copy all files vs on 400 at a time?

2)Does Photo app keep track of what previous files copied to PC in order to copy on the new files?

thanks  Keith

Dear

I've been experiencing this issue since a long time, but it doesn't seem to be solved from version to version.

I would like to make a backup from my iphone to my NAS (and not locally on my computer), when I go via the backup button it doesn't work, it crashes the macos app immediately.

If I make a simple transfer without the backup feature, it doesn't give any problem or chosing to change the path and browse on my nas. So I believe there is a real issue behind the "change path" in the "backup device"

Can you let me know if there is a workaround?

Thanks

C.