I'm all for options in the storage service space but "FS" signals (to me) that this acts as a (POSIX) file system. Does it expose NFS rpc? If not, what does an

I'm all for options in the storage service space but "FS" signals (to me) that this acts as a (POSIX) file system. Does it expose NFS rpc? If not, what does an S3-like storage service API expose that basic HTTP/1.1 with eg. range request doesn't?