sabre/dav VS rclone

https://sabre.io/ is an option.

CalDAV/CardDAV server using sabre/dav

I think Mealie, Planka, and AgenDAV (backend)/Sabre (frontend) would allow you to do all those things self-hosted, albeit not all in one place.

- Davical - https://gitlab.com/davical-project/davical - PHP - sabre/dav - https://github.com/sabre-io/dav - PHP - radicale - https://github.com/Kozea/Radicale - Python

Have you looked into https://sabre.io/ ?

If you are self-hosting you could look at - Sabre https://sabre.io/ - Horde https://www.horde.org/

rclone: a command-line program to manage files on cloud storage.

Synchronise buckets with Sclone or Rclone

Says that Apple doesn't provide a multi platform API. It doesn't provide any official supported way to access iCloud from Windows, Linux.

There's a ticket covering everything you might ever want to know:

https://github.com/rclone/rclone/issues/1778

seconding rsync and syncthing.

the server could expose an smb or nfs share, the client could mount it, and then sync to that mount.

rsync over ssh also works, if you do not want to run smb/nfs.

this is also a cool tool https://rclone.org/

rclone [1] to dropbox. works since years without problems

[1] https://rclone.org/

rclone provides a special pCloud config option, which makes the setup straight forward. rclone can encrypt the data it uploads with its own encryption but not with the pCloud encryption. Therefore it can only upload data to the unencrypted pCloud folders, not to the Crypto Folder.

The arkclone project impliments rclone in ArkOS to achieve cloud saves. Not yet built in to ArkOS yet, and not a lot of recent traction on the pull request to get it added, but it can be installed manually.