Copy Files From Flash Drive To Ubuntu

I am attempting to copy files from my flash drive to my local drive on Ubuntu. This is the command that I ran

sudo cp -i  /media/owner/ESD-USB/mysql /var/lib/

But that output a message of - and the files were not copied over (replacing the original files)

cp: omitting directory '/media/owner/ESD-USB/mysql'

What do I need to do in order to copy this directory from my flash drive and over write the current directory on my hard drive?

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