As I said, PFS is basically irrelevant if data at rest is unencrypted.
In a client server scenario where I want to sync my files to/from an untrusted server it makes perfect sense to encrypt the files. That’s what I am looking for. Files should be encrypted before uploading and decrypted after downloading. If you compromise the server you get nothing.
Just don’t mention PFS. Clearly state that data is encrypted in transit with TLS and is stored unencrypted on the server. At least that’s the information that I was looking for.