SyncThing is pretty useful for copying files automatically between devices. It can be configured to say have every photo you upload automatically copied to anot

SyncThing is pretty useful for copying files automatically between devices. It can be configured to say have every photo you upload automatically copied to another computer. It was a little tricky to try to make sure that when photos were deleted from the phone they weren't deleted from their backup/photo archive. I think I got that working. Just make sure you document your setup so that you can easily provision new devices when your setup changes. Might I also recommend getting some photos printed individually or in a book. The longevity of physical objects and accessibility of them is pretty hard to discount. It will also help your kid to be able to look at them as they grow older.