How to remove write protection from usb flash-drive?

Hello,

I read and tried most of this forum…it didn’t help. My USB is SanDisk 64 GB Ultra Fit bought this year, looks qute nice with metal casing, now after 4-5 mounts I can’t format, write or create files. Neither with Window or Linux. Totally useless…

Registry change does not help. Windows Device Mnager, HP USB Stirage and similar tools all returns “Write Protected” errors…