sencha studio: configuration of archive server

How should I configure Archive Server in Sencha Studio?

Configure Remote Archive Server

I tried direct it on folder "mystoragearea" with storage.jason containing sample storage area

`{
"my_secret_key": {
    "path": "/mystoragearea"
}

}`

But only what I get is

Failed to load remote archive catalog : path/to/mystoragearea/catalog.json