Cool. This post I wrote back is a little nerdy, but I’ve found the Open Source rsync command to be very helpful for doing data migrations. A straight copy will be a little faster, but when copying over 100,000 files, it’s not uncommon for the copy process to be interrupted, forcing you to start over to be sure you got everything.
Rsync is smarter than a straight copy in that it analyzes the source and destination locations and only copies/updates files that are out of sync. It’s a lot more powerful than that. You can read more about it here.
Here’s my post: Backing up to hard disk - #6 by David_Snyder
The use case in my post is a bit different, but once you get your files there, you’ll probably be looking for a way to back things up. This is, essentially, the process that I use. Let me know if you have questions.