|Sandisk has common problem if you dare to plug out the usb drive before using hardware removal first|
Here is the detail on how to fix the problem
Step 1 is Data Recovery - if you had important data at hand, do back up first!
There is many tool of recovery software on market you can choose out there. My favourite one is DiskGetor Data Recovery. I find this tool is the most straight foward usage , one of the fastest smooth recovery software on market, with great rate of recovery success. Further the rescue process will retain the original file and folder name. Usage for personal is free! Warning. Be remember to do backup into other drive than USB itself!
Step 2 is download this usb recovery disk fix.
|Hit that restore button babeh.. :)|
|Hit thats restore button once more babeh..:)|
Wait the process to finish, and the drive will automatically restore to factory default. Good luck.
p/s Warning. Do this DIY on your risk..