Why don't all my pictures from my phone show up when connected to computer?
Why don't all my photos appear in the folder on my computer screen when I open the internal storage?
iPhone 5s, iOS 9.3.1
What folder and internal storage from where? What app are you using to try to view the photos?
You need to describe what you're doing in detail before we can begin to help with a solution. What devices you're using, what operating systems, what apps and versions are you using, etc.?