How to solve driver issue for Sandisk Cruser Blade Pendrive 16gb

I tried to format using command promt since my Pendrive showing write procted: After that try,

1.My USB Device not Showing in My Computer

2.In Disk Management, I can see the drive as Sandisk Cruser Blade but when I right click on it all the options were disabled, except Properties and Help.

3.I also tried for Uninstalling the Unknown device in Device manager and then Scan for Hardware changes in the Action menu of Device manager.

Also In DIsk Management it's showing me that Disk 1(16 gb Sandisk Cruser Blade) as Read Only