[Solved] Problem to store information

Thanks everyone! Got it!

Wow, that was painful.

s=require("Storage");
s.eraseAll();
s.write("a",new Uint8Array(4000));
s.write("b",new Uint8Array(100));
s.write("b",new Uint8Array(10));

Issue filed at https://github.com/espruino/Espruino/iss­ues/1801 with a bit of explanation too