Notes: Memos
https://www.usememos.com/
Calendar: still Nextcloud (caldav is fast enough in nextcloud, even with sqlite) or SOGo
https://sogo.nu
Files: Owncloud OCIS (not the old PHP one)
https://owncloud.dev/ocis/
Connect with more v(erbose) output to your server. Example:
ssh -vvvv @
... and read line by line.
Notes: Memos
https://www.usememos.com/
Calendar: still Nextcloud (caldav is fast enough in nextcloud, even with sqlite) or SOGo
https://sogo.nu
Files: Owncloud OCIS (not the old PHP one)
https://owncloud.dev/ocis/