Extreme 3.0 not recognized in 2.0 port

:smiley:   Hi ANG3L,

Dear member of SanDisk Community, welcome.

Friend, thanks for the photo, is very beautiful and instructive.

Please:

Inspect with a magnifying glass and a flashlight, the USB 3.0 plug of the UFD, and clean the pins,

with wire or eyebrow tweezers, etc., and with isopropyl alcohol (or also medicinal).
Also try, with a can of “compressed air” and a paintbrush, etc.

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.

If the above steps have not solved the problem please, contact SanDisk Technical Support

who will replace the device _ if it’s authentic _ and is within warranty.

Link: http://www.sandisk.com/about-sandisk/contact-us/

 

Luck.

Regards, Alfred.                                                           (Google translated)