[Solved] Problem to store information

Thanks for this! Although what firmware are you using? I just tried this on the KickStarter firmware and latest, and I get:

let set={"id":1,"test":2};
let sto=require("Storage");
sto.writeJSON("test.json",set);
sto.write("test.json","test123");
sto.list("test.json");
=[
  "test.json"
 ]

So it doesn't seem to reproduce it for me :(