Copying files couldnt complete because disk keeps dissapearing, USB erase failed, And now my USB is unregocnizable by my laptop

I absolutely regret buying a macbook. Today i tried to copy some files using a usb hub, and it keeps failing because the disk keeps dissapearing when copying. I tried to erase it to change the format because a youtube tutorial said so, and now the disk is unreadable, and first aid doesnt even help the slightest.