I have a Sandisk Ultra Backup 16 GB, and it’s worked like a charm - until recently. As of a few days ago, whenever I plug the device into my computer it doesn’t show up AT ALL. Not on device manager, not in ‘Devices with Removable Storge’, no nothing. So far I’ve tried plugging it other USB ports, all to no avail. I also plugged it into my laptop, but even my laptop doesn’t recognize it. The orange light on the device glows, but it isn’t recognized by any of my computers. As far as I know, I didn’t do anything to it. I just plugged it into my computer one day and it didn’t show up on the computer.