Each Subscription plan includes prescribed storage limits.
You can also configure your users to use a different cloud storage backend that you own or purchase separately.
Supported storage backends: Google Cloud Storage, Azure Blob, other SFTP servers and S3 Compatible,
so Blacklaze B2, Wasabi, IDrive E2, Cloudflare R2 and in general any cloud storage implementing the S3 protocol.
Of course, each Subscription plan includes other resource limits such as CPU and RAM. You can't expect, for example,
to subscribe to a "Tiny" plan, add 1TB of your storage, and have the same performance as a "Standard" plan.