[Solved] Problem to store information

So I could reproduce writing duplicate files with a mixture of writeJSON and write
Not sure it is what happened here and with the alarm app though, but maybe it is related:

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",
  "test.json"
 ]
>sto.read("test.json")
="test123"
>sto.readJSON("test.json")
Uncaught SyntaxError: Expecting a valid value, got ID
 at line 1 col 8
test123
       ^

So both readand readJSON then only can read the latter file.