Files uploaded, although I like to delete them

When I take a picture of a situation, I shoot a couple of times and go through them afterwards. The best image I keep, all others I delete.
However, in the meantime, it has uploaded all images on My Cloud already. In addition, if I delete the images on my devices, I have to delete them on My Cloud too. That generates a lot of additional work.
Is there a special setting where I can say i.e. the uploads shall be done only once a week? Or do you know another solution for this problem?

@Philipp9 if Auto Backup is enabled, it will backup all pictures located in the Camera Roll.
The best solution would be to disable Auto Backup and use the “Sent To” option in the mobile app so that only the pictures that you want are uploaded.