If you're afraid of file corruption, install par2 with homebrew.
My procedure for pictures is that monthly, I copy them off of my phone onto my storage. Then I run par2 in that directory to add a parity file. That all goes onto the backup.
My procedure for pictures is that monthly, I copy them off of my phone onto my storage. Then I run par2 in that directory to add a parity file. That all goes onto the backup.