Windows 10 and photo import to Blog


I have had a Blog for 6+ years but cannot figure out how to get photos from Dropbox to my New Blog page in Windows 10. Drag and drop doesn’t work, nor does copy and paste. Any ideas? I have been working at this for several days and must be missing something basic. Is there another way to do this other than using Dropbox? I also had a devil of a time even getting my photos off the camera (Canon SX 50 HS)