[Terrt8362]

I have a moto g power and it stores pictures under "Photos" but when I am using Facebook and try to post a photo that is already stored on my phone Facebook looks in "Gallery" which doesn't exist on my phone. How can I get Facebook to open up "photos" which is where all my pictures are stored?

[mustang7757]

Welcome to AC!
If you tap on "Gallery " it should give more options like my screenshot

[B. Diddy]

Welcome to Android Central! Do you mean that your photos are saved in your Google Photos in the cloud? Did you ever use the Free Up Space option in Google Photos? If so, then your photos aren't located on your phone's internal storage -- they're only in the cloud, and your phone probably can't directly access those photos when you're trying to select one to post on Facebook. I think that's possible on a Pixel phone, but it may not be possible on other phones.