Update README.md

README.md

@@ -13,7 +13,7 @@ There are currently two supported storage options:
 * S3 storage - Blobs are written to an S3 bucket (or compatible service)
 
 You can control which storage backend is used by setting the `BLOB_API_DATA_STORE` and `BLOB_ARCHIVER_DATA_STORE` to 
-either `disk` or `s3`.
+either `file` or `s3`.
 
 The `s3` backend will also work with (for example) Google Cloud Storage buckets (instructions [here](https://medium.com/google-cloud/using-google-cloud-storage-with-minio-object-storage-c994fe4aab6b)). 
 
@@ -57,4 +57,4 @@ go run api/cmd/main.go
 # Archiver
 go run archiver/cmd/main.go
 
-```
+```