Failure reading the filesystems file (err=1)

I backed all my files onto a Sandisk cruz glide 32gb as Acer told me to restore my laptop to factory settings (so will lose all files). I’ve done this, put the flash drive back in, and get the error message above. How can I get my files back? Very frustrated.

What’s issuing the msg, Windows or SanDisk?  What version Windows?  Did you use SecureAccess?  Does this posting help?