If you use AppVeyor CI and want a reliable way for long-term storage or simply mirroring of build artifacts you need to check out this project: https://github.com/nefarius/AppVeyorArtifactsReceiver
It spawns a webhook server listening to finished builds and downloads a copy of the artifacts to a local filesystem path you can then e.g. simply host with any webserver serving static files.
Check it out!