"The ability to take microscopy movies has greatly improved during the past five to 10 years," Weeks says. "Back in the mid-90s, the raw data from one two-hour data set would be four gigabytes. It would have completely filled up your hard drive. Now, it's just a tiny part of your hard drive, like a single DVD."
I think I know what he means - but at least as I read it, it didn't come out that way. It would have helped if he had just said the ability to store microscopy movies has improved - not the ability to take them.