Origineel bericht door: Philip Le Riche ,
It sounds like Windows can’t recognise the content as a valid file system even though it can recognise it as a USB device. If you haven’t already, try it in a different USB port, then a different computer. Under Computer Management - Disk Management, can you see a healthy partition on it? You might be able to recover it with [https://www.ccleaner.com/recuva|Recuva], otherwise a partition recovery tool such as [https://www.easeus.com/partition-recovery/index.htm|EaseUS] might work.