maggierob wrote: … tried to upload photos to my facebook account but it kept saying I should select a file and then that it couldn't upload. … I used a Lumix camera and a usb port device to plug in the SD card and then plugged that in. Nothing would work. No photo would upload. Sorry I can't explain it any better than that. It's usually easy to do. I haven't used my Lumix camera for a few months. Thanks
Maybe you could explain it better than that. It would be helpful to know the exact steps you took, which buttons you pressed, what the response to each was. I don't do Facebook, but we may be able to help if you tell us more.
I mean, if I want to sent a picture to Google Photos, for instance, I click on "Upload a File," and it takes me to a "Choose a File" dialog. Then I can navigate to a folder on my Mac, or I can go to the bottom "Media" section for the "Photos" choice

where I can pick pictures from my Photos Library.
What do you do that's different, and where does it fail to work?
Also,
- Do you have more than one Photos Library?
- Where does your Mac's Photos Library reside-- in the Pictures folder of your internal drive, or on an external drive? or on a network? on iCloud drive?
- Are you using iCloud Photos to synchronize your devices? If so
- …Do you have “Optimize Storage” checked in Photos’ Settings
- …Do you see all your Mac’s Photos pictures at iCloud.com?
- …Have you checked to see if the Apple Account is really really the same on the Mac and at iCloud.com?
- …What is your storage at iCloud.com? At System Settings>[name]>icloud>Storage , my Mac says 176 GB of 200 GB used. What does yours say?
- What is your storage on this Mac? At System Settings>General> Storage, my Mac says 745 GB of 1TBB used. What does yours say?