https://www.theregister.co.uk/2018/05/31/backup_gdpr_analysis/

"The right to erasure is not absolute," the UK Information Commissioner's Office told us as the question of the backup tech industry's exposure to the EU's General Data Protection Regulation was raised in the week after it came into force.

A spokesperson told us: "The right to erasure ... only applies in certain circumstances, and even then, an exemption may apply. Organisations should consult our guidance on the right to erasure for more information on when the right applies and what they need to do if it does.