Permanent storage used to store any string data on the server

Delete data by key on the server.

The method does not return an error if the item with the specified key is missing.

await Application.storage.deleteItem('key');

Get data from the server using a key.

Save data to the server using a key.

The size of the value is limited: it must not exceed 16 megabytes.

await Application.storage.setItem('key', JSON.stringify({ 'some_key' :  'some_data', 'arr' : [ 1, 2, 3 ] }));
// Further in the code, when data is  requested 
let value = JSON.parse(await Application.storage.getItem('key'));