Hello @Lucas Sebastian Dereani 

Please checkout this link once. This will help you out.

failed-to-execute-setitem-on-storage

Regards

Prince

Hi @Lucas Sebastian Dereani 

Client variables use local storage. Local storage limits depend on each browser so go though the following link to understand limit

Link:

https://www.sitepoint.com/html5-local-storage-revisited/

Alternative solution:

If you have large data than create a table and store this base64 data in this table so its is good for you and also follow best Practices Until Its depend upon your Requirements

Thanks

Md Mansur  

Hi,

The local storage size varies from browser to browser (2.5 MB per origin in Google Chrome; 5 MB per origin in Mozilla Firefox, and Opera; 10 MB per storage area in Internet Explorer). 

You can also test your browser's local storage here. 

Thanks,
Afaque