Please make it possible to store the collection xml files on the same drive as the actual images, in the same way that I can set the cache location. If you did that, then I could just have an external SSD with my photographic archive, bridge cache and collection files all in one place and I'd be able to plug that SSD into my laptop or desktop and have everything available.

In fact, why not make an option to have ALL bridge settings associated with an image saved to the same drive on which the images reside - I'm thinking about labels and ratings, core metadata, collections etc etc.