There is definitely a huge drop off for access to files after a certain age. I'd say after a month there is really very little need for me to access them direct

There is definitely a huge drop off for access to files after a certain age. I'd say after a month there is really very little need for me to access them directly. After that, it is sporadic for when I would want a specific file. A benefit of Dropbox/Carousel (+ Lightroom locally), is I can fly through all 215GB via thumbnail representations without having to call the file explicitly. If there were some mechanism to offload storage to s3 or glacier, while retaining the nice UI afforded by the Dropbox/Lightroom clients, I would be all over that.