Related? https://railway.canny.io/feature-requests/p/volume-explorer

I think this is a good idea, although you can already do this just by adding a protected gzip + streaming download route onto whatever API/web application you're deploying to railway. You could also back it up straight onto something like cloudflare R2 or aws S3

It would be good to migrate/backup cms image files dir from an existing system.

This would be very important so that we can export or import data from the storage. SFTP access would be helpful. But you could also solve it via a Railway UI with import and export of ZIP.

In the long run, it would of course be good to be able to do this programmatically via a CLI or API so that this doesn't have to be a manual process.

+1 :)