Well... don't ignore messages telling you to wait! What filesystem is your stick? Sounds like this may be a duplicate of https://bugs.launchpad.net/ubuntu/+bug/85291 (removable media not being fsck'd automatically).
Well... don't ignore messages telling you to wait! /bugs.launchpad .net/ubuntu/ +bug/85291 (removable media not being fsck'd automatically).
What filesystem is your stick? Sounds like this may be a duplicate of https:/