If you’re talking multiple Terrabytes and are located in the EU you might want to consider AWS Glacier I have like 6Tb on there and pay sub 20€ p.m. If you’re in the EU you can request one free migration download by contacting the support. Otherwise you’ll pay thousands.

Mullvad semi recently closed it’s port forwarding service. Afaik AirVpn is (one of) the only ones remaining that allows you to expose ports through there service