Actually, that's how I just did it. And it worked!
:I know there are other ways, but this is how I did it. I opened a kingsnake photo gallery account for free. I up loaded my photos. And then, any time you post you will see a bar at the bottom of the post your are writing that says "select image from photo gallery" you can then pick from a list of all photos you have in the kingsnake gallery. There are other ways, but that is how I do it.