Some machines need the 2 GB so there's less memory for the machine to "go through" to get to the designs.
They are getting harder to find since most people want the bigger flash drives for general use.
Our fabric store ordered some just for that reason. You can find them at some office supplies or order online.
Here's a link to Walmart for a quick look:
http://www.walmart.com/search/search...7&wl4=&veh=sem