Hey there! Thanks for joining the forums and speaking with us!
We have an excellent article for tracking down disk usage on the machine here:
Symptoms Disk usage can quickly grow for a variety of reasons. It's important to understand how to diagnose and break down the disk usage when this happens. Description Managing disk usage is c...
support.cpanel.net
so I'd recommend working through those steps and then letting me know if you still see issues or if you need clarification on any of the disk usage you're finding on the machine.