I have created a file upload (using lightning: input type=”file”) in which am trying to upload multiple files which has more than 4MB combining all the files am getting Error: Received exception event aura:systemError from server. Am able to successfully upload if files combining size is less than 2.8MB

Note: I cannot use standard lightning file upload because I don’t have “Id” so I created this Custom one.

IN file upload code and in apex am decoding this base64