Dear member of SanDisk Community, welcome.
1- [ _i am having issue with PEndirve 3.0 Extreme SDCZ80 last year but this USB 3.0 will cause PC to reboot after i power off. _ ]
I suspect, “Short Circuit” by poor contact of a pin bent.
Inspect with a magnifying glass and a flashlight, the USB 3.0 plug of the Cruzer, and clean the pins, with wire or eyebrow tweezers, etc., and with isopropyl alcohol (or also, the medicinal).
Check, that the pins (Standard has 9 pins, 7 for USB 3.0 + 2 for USB 2.0), are not dirty, bent or broken, or simply not fit as it corresponds.
2- [ _Then i purchase another Pendirve 3.0 Extreme SDCZ80 and it does not cause me any failure. _ ]
Well, if the above still bad, you can return it.
Contact _ SanDisk Technical Support _ who will replace the device, if it’s authentic and is within warranty.
3- [ Can i know how to check the FW version of the pendrive and where can i get the full list of FW change for Extreme SDCZ80 USB 3.0? ]
Mmm… I understand that FW, means FirmWare.
Well, there is no firmware for UFD (pendrives and cards), available to the user.
Luck, and then you tell us, what happened, please.
Regards, Alfred. (Google translated)