I have a HP 64bg usb 2.0 flash drive, which is expensive for me. My elder sister used this flash drive for taking some lectures from a friend. Her friend's PC was working on Ubuntu. After she took lectures in USB, the flash drive was not working either on Windows or Android (OTG). I tried formatting, but it says 'Write Protected disk'. And sometimes it also gives an error that file system is not recognized. I have tried those fixes which use command line to remove write protection. It didnt work. I also tried other fixes. But I haven't tried booting it on ubuntu as the PC which damaged is has turned into trash now. Can I get some help please?