Hi,
Proton Drive is currently is beta and I’m not sure if it’s available for integrations, but it would be nice to have it as one of the backup storage options.
Thank you
This idea was posted in UpdraftPlus - backup/restore plugin and tagged backup, proton, storage on August 3, 2022 by 
Valeriia.
Second this, would be greatly appreciated.
Third this. I’m disappointed this isn’t already a feature. I just signed up for UpdraftPlus Premium and am wondering if it was a mistake seeing as it can’t even backup to my Protonmail accounts 15 GB of storage.
Fourth this :)
Migrating there, away from big-tech and commerce.
Proton Drive have to provide a public API that external software (such as UpdraftPlus) can use.
I suggested that at Proton Drive development