That's the drawback with DW too, the limited space.

Before DW made visual upload possible, and since a lot of image hosts started restricting content, I've been using Google Photos as a host. I have to caveat this by saying that it is not designed for embeds, which means I have to use a secondary tool in order to create embed links. However I have been using it since 2013, it offers a lot of space, and it's unlikely Google will discontinue it as a service, which gives the links a lot of stability. Also free.