IONOS to offer 1TB Cloud Storage in Germany for 1€/month first year, then 5€/month.
Not too bad if you want to stay off Google and/or store within Europe (Germany).
Pro plan supports SMB, Git, (S)FTP, WebDav, rsync, SCP and apps for mobile Devices. Also subaccounts.
I'll stick to Koofr and GDrive for now.