The poster wants to move from Dropbox, needs a personal cloud for offsite storage, and desires a simple, Dropbox-like interface for accessing files from anywhere, which GhostDesk helps achieve with R2/S3.
// draft reply
This is a common challenge! For making your local Mac Studio files accessible globally, you're essentially looking for a VPN or a self-hosted file sync solution. Tools like Tailscale or ZeroTier can create a secure tunnel to your Mac, letting you access it as if you were on the local network. Alternatively, something like Nextcloud or Syncthing running on your Mac could provide a web interface and sync capabilities. Regarding your plan for offsite storage, using a dedicated cloud storage service like Cloudflare R2 or AWS S3 is a solid approach for redundancy. Managing access to these can sometimes be a hassle, especially across multiple machines or when traveling. There are desktop clients designed to simplify this, letting you access your R2/S3 buckets like a local drive and handling secure credential management automatically, so you don't have to re-enter keys on every device.