Dell PowerEdge R710 ESXi installation [on which disk should I install?]

Im very new to the whole virtualization thing. I have a server that I can learn on, its Dell PowerEdge R710. I tried to install ESXi 5.5 on it.

I booted from my CD with ESXi 5.5 I downloaded from VMware, and had some doubts where should I install the ESXi. I had two options to choose:

1. Local: Single Flash Reader (972 MiB)


2. Remote: Dell Virtual Disk (136.12 GiB)

and I wasnt sure where to install ESXi. I decided to install it on Dell Virtual Disk, and did it. But then, I watched a video on YouTube (http://www.youtube.com/watch?v=xCd7Wclfqmg) where the author said that we need to install ESXi on a flash card.

So I did it wrong, right? What do I need to do to remove ESXi from Dell Virtual Disk (just clean it al, make it "empty", format it or something?) and install ESXi on a Flash Reader?

Or maybe I did the right thing? Cheers