How do I force MSC mode?

I did it last night but my computer won’t recognize it again today and I can’t get it in the right mode again?  any ideas?

I’m not sure this supports MSC mode.

For recognition problems, one trick is to fully turn it off (hold power button for 8 seconds till it says “Shutdown” or “Shutting down” or similar), and then connect via USB (and patiently wait for the five balls to appear).

The Connect definitely does not support MSC mode (one of its few shortcomings).

jj2me’s suggestion on how to deal with recognition problems has worked for me in the past.