Each attachment can be up to 150MB in size.
To add an attachment
Write your comment and click the attach icon.
Browse to the file you want to attach. You can add more than one attachment if you like.
Click the send icon.
Your comment will now show the attachment and look like this:
You can also drag a file on top of your comment as well to add it as an attachment.
If you have an image on your clipboard, simply paste the image into the comment and it will create the attachment automatically.
All these file types are supported – including video, GIFs, HTML (just zip the HTML file first), and of course zipped folders containing multiple files.