This is the easiest way to post pics, no external service is needed. You may need to convert photos to JPEG format, RAW format probably won't work.
Click on the Create a Post Button and you can change the post type from Link Post to Image Post. It is under the blank space for Title. When the image post screen fully loads, there is a square. In the middle it says "upload an image". Click on this and upload a JPEG, GIF or PNG image. A menu of folders on your hard drive will pop up. If the file is on your desk top, give the file a name like "Aphoto.jpg" and it will be easier to find in a alphabetical sort.
This is the easiest way to post pics, no external service is needed. You may need to convert photos to JPEG format, RAW format probably won't work.