When I enter a USB drive on Windows I if it doesn't have a partition that is recognised by Windows and tools such as Disk Management say "No Media" or File System Unknown.
On Linux I can use tools like fdisk to confirm what kind of file system is present. What options are there to do this on Windows?

diskpartshould be able to at least show you the size of the partitions on said device. – Seth Jan 24 '17 at 07:57fdiskdoes not tell you what filesystem is actually used. It just reads a (very generic!) code that indicates the partition type. That being said, your USB drive is most likely toast. – Daniel B Jan 24 '17 at 09:06