(adsbygoogle = window.adsbygoogle || []).push({}); Need a little help on getting on to dex when i go to export flash to file it says please insert usb drive (/dev_usb000) with at least 256MB free space and try again if any1 could please help me

Change it to dev_usb001 and put the usb back in.

It need to be on the USB that is on the right hand side. The one closets to the blu-ray drive.
Is that USB working?

yes the usb is working but my jb has 4 slots for the usb

Use the one that is on the most right.