Storage API for the developer

As we are developing an front end App, we need to store certain data in the database storage using the database storage. Could you please confirm us the below points.

1. We are in need of know the storage limit for an APP.
2. Is it possible to store object or array of values in a key?
   Example:
   ```
   monday.storage.instance.setItem(‘AzureDomain’, values.azuredomain).then(res => {
   console.log(“setItem…”,res);
   });

Thanks in Advance!
Priya