Sounds like your bit rate is slower coming through the USB ports. Can you wait to plug in after your computer starts? Would it work the same that way with a faster start?
Take the design to a shop that does screen printing. Usually that is a t-shirt shop that does custom printing. Their print equipment should be able to handle your job.
Take the design to a shop that does screen printing. Usually that is a t-shirt shop that does custom printing. Their print equipment should be able to handle your job.