I plugged in my 64 gb flash drive and the computer ask me to format it. I have about 6 gb of data on it. I did not format it. I tried several online data recovery tools with no luck. When I go into disk management it is only showing as a 32 gb drive and all space is unallocated and raw data. I booted with parted magic and ran testdisk but it didn't find any partitions. For the last few weeks I have been getting a message when the flash drive was insert to scan it for issues. I would click on "continue without scanning".
Any suggestions on what to try next. Running windows 7.