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May be it was wrong decision, but I had no opportunity to make it in another way. I'd tried to burn image of Windows by means of dd on Ubuntu. I used it as usually, but once it'd gotten stuck on some moment and I just unplugged my USB-flesh and tried to plug in once again. fdisk couldn't detect /dev/sdb device, however, I was able to watch files on USB-flash. I didn't pay attention, but after I perceived this image is wrong. I wanted to clean up my USB-flash devise, but now I cannot make something. When I try

sudo dd if=/dev/zero of=/dev/sdb bs=512 count=1

I get 

dd: failed to open '/dev/sdb': No medium found

dmesg, lsusb detect my device. lsblk sees nothing.

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    Possible duplicate of [How to recover USB flash drive functionality after having used dd?](https://askubuntu.com/questions/1044056/how-to-recover-usb-flash-drive-functionality-after-having-used-dd) – karel Jul 04 '19 at 00:11
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    Try with gparted – schrodingerscatcuriosity Jul 04 '19 at 00:12
  • If you can't even see the device name `/dev/XdY` (where `X` and `Y` are the identifiers of the USB stick) then it's utterly broken and needs to be replaced. – Fabby Jul 04 '19 at 11:21

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