Hi,

"/Data/Sites/1/media/wlw/image1.png"

is correct, image paths need to be relative to the root of the web site and the first / represents the root of the web site.

If your site is running in a sub folder instead of as a root site then the path would need to be /foldername/Data/Sites/1/media/wlw/image1.png becuase it needs to be a path that is relative to the root of the site not the root of the folder, the folder must be part of the path in that case.

Best,

Joe