Alles anzeigenI use brand new Sandisk Ultra Dual Drive 32GB USB 3.1 pendrive from the first minute. i dont think this was the problem.
I prepare the complete upgrade pack ( USB1,2,3) in windows 10. Format, re download, extract, copy.
After this, USB 1 and 2 wont do anything. USB3 start automatically and stops in the Repro Vup Complete, like before.
With the windows sticks i wait 5-10 minutes, but nothing. ( With the mac USB3 i wait 1 and half our, and nothing.)
5-10 minutes may be not enough for the process to finish. Give it more time, at least 15-20 minutes.
You may also try to delete personal data before trying again the USB3 upgrade.