You need around 2.3 GB for the install to complete. The installer should be better at checking for this, which is a known issue. Thanks for reporting.
** Changed in: ubiquity (Ubuntu) Status: Unconfirmed => Rejected -- Installer crashed while copying files to USB install target https://launchpad.net/bugs/82946 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs