had some problem where I can't open file in my 500gb external drive:
had only 9gb free space
cant scan as well
but it can be reformatted but I dont want to erase my files
Anyway I can recover those files?
More about :open files external drive maker bufallo
Can you attach the HDD to a Ubuntu system and get the files from it?
At this point, using a different OS would make sense, because Windows seems to have problems with HDDs that have less than 15% free space.