To post a file from a computer:
1. Go the group/page you would like to post a in image or file on
2. Select the paper clip icon from the post box and select 'Image' or 'File'
3. You can then browse files saved on your computer and select the image or file you would like to share
4. The image or file you have selected will then appear below the post box once it has been processed and uploaded. You will then need to write a post in the post box to accompany your image or file (you cannot post an image or file without writing a post).
7. Click the blue 'Post' button once you're ready to post your image or file.