new here, facing 'disk quota exceeded' error in cPanel for basic server management, help?

hey everyone, i'm totally new to cPanel and managin my own site.

• i just launched a small app and now i'm seeing this 'disk quota exceeded' error in cPanel, which is kinda confusing. it's stopping me from uploading new files and i'm trying to understand how it relates to general server management, like understanding my current resource limits.
• what are the simplest, most practical steps i can take to fix this and avoid it in the future? i'm looking for really basicc advice here.

waiting for an expert reply!