If it fails on all computers it looks like its dead.
Software cannot read from a flash drive if a computer cannot see it.
You could try it in the computer at work. If it works try reformatting the flash drive before putting anything else on it.
Fujitsu Lifebook P727 laptop review
Best of the Grad Shows 2017: University of the West of England (UWE)
Best value Mac: Which is the best £1249 Mac to buy
Les meilleures GoPro 2017