How can I make all of my photos get downloaded onto my laptop?

Usually I don't have a problem with this. But I have around 2,000 photos and when I try to download them to my laptop off of my iPhone, the laptop won't find them all. I've tried doing some stuff with my iCloud but it didn't work. I've downloaded over 3,000 pictures before but some reason I'm having a problem this time with only 2,000. Not a storage problem either. My laptop will only find 20 pictures out of them all. Someone help, thanks!

Connect your phone to your computer via a wire, then copy and paste the photos from one to the other.