>Hi,
>
>I have a Flash USB drive. I could plug it into a computer (tried on 2 computers), first it worked and I could copy files to this flash drive. But then it stopped working; showed no information. Even though when I was plugging it into the computer, a letter drive was assigned and I could see it in the Windows Explorer. I tried to format but formatting would fail.
>So I decided to destroy all information on this USB. I put it in the microwave for about 5 seconds, 3-4 times (I didn't want it to melt). Now when I plug this flash drive into a computer USB, it won't even show in the Windows Explorer. Was I successful? :)

From the thread title I thought you were referring to this: http://www.theregister.co.uk/2016/12/02/hackers_waste_xbox_one_ps4_macbook_pixel_with_usb_zapper/

If it's high-value data microwaving probably isn't good enough. It might just melt an internal trace, which could be easily fixed by a skilled tech.

I like Victor's idea, assuming you have a suitable blender. There's the long-time "Will It Blend?" meme on YouTube e.g. https://www.youtube.com/watch?v=3OmpnfL5PCw

3OmpnfL5PCw