I can't import my pictures to my computer?

I have an iPhone 4 and previously in September I imported the 7, 000 pictures I had at the time on my phone onto my laptop. I never got the chance to delete all of them off. Now I have 19, 000 pictures and when I plug my phone in it doesn't ask me to import them or anything anymore. It's taking around 8gb of memory from my phone and I barely have any apps. At first I thought it was my computer that was the problem but I chatted with a technician and they said it was the iPhone that had the problem. Can anyone help me?

Have you tried using Dropbox? It's an app that let's you share files & photos between devices. I don't know if you have enough memory to download it, but that might be an option for you. Maybe you could download it onto your computer and transfer them little by little. That's a lot of pictures, though. Hope this helps.