For file storage, add support for Google Cloud Storage
For users who don't want to or can't use Amazon S3 or local filesystem, adding support for Google Cloud Storage improves the "Cloud portability" of Mattermost, in addition to supporting more use cases.
If you add support for generic SSH connections, you can be agnostic to which cloud/VPS/dedicated server you use. Here is my request: https://mattermost.uservoice.com/forums/306457-general/suggestions/33653056-add-support-for-custom-server-storage-via-ssh
Jason Dobry commented
I would be interested in implementing the feature myself.