Flashing Roon with Etcher Question

I prepped the USB via Etcher, used a huge USB stick, and when the device was finished flashing the 128 Gb USB was reduced down to peanuts but with two partitioned volumes (1) an E: drive called CUSTOM_ROON with an empty folder named “identity” and a roon.tar.bz2 file of only 66.057 KB, and (2) an F: drive named "USB Drive (F:) with no content.
Before loading up my new NUC is this the right “flash”? The original mg file is almost 200,000 KB.
Thanks in advance, ECK