What's the best cloud storage in terms of privacy and price?

Need over 3 TB. Would be nice if the (preassigned) folders on my phone could be synced with the cloud storage on the fly.

I know I could use any cloud storage service + crytomator but unless cryptomator can automatically encrypt and decrypt files seamlessly without my direct intervention, that's not going to work out. So will have to depend on the cloud's privacy and security setup

cloud cloud storage decrypt encrypt files folders nice phone privacy service storage terms