Comment by mgoetzke

Tell me about it. My iPhone cannot backup up, neither could me predecessor phone.

Escalated all the way to developers. Their 'analysis'. Whatsapp is supposedly blocking 4TeB on my iCloud account which is not available.

I asked whether they might have misread that as WhatsApp says 4GiB and even if , that would still be an iOS bug (why allow that?).

No reaction anymore.