01-29-2018 06:57 AM - edited 01-29-2018 06:59 AM
"corrupted": from command prompt run chkdsk on it.
"format": try the free recovery apps listed in the second posting in this thread - http://forums.sandisk.com/t5/All-SanDisk-USB-Flash-Drives/Download-new-version-lost-access-to-all-da...
"solve": don't use a computer anymore.
Important files = Backed up files
03-12-2018 04:54 AM
Sandisk has it's own recovery software if I'm not wrong and if that isn't working for you , there are some third party tools like stellar phoenix photo recovery that'll help you out and recover files in no time.