Help!!! Flash Drive has a problem!

Hello, I saved a good amount of pictures on a maxell 32gb flash drive and when I plug it into my computer it tells me "it is not accessible. The filename, directory name, or volume label syntax is incorrect".

Does this mean I have lost all of these files? Is there a way to fix this? Or at least get the pictures off of it? There are once in a lifetime memories on here and of course I already deleted the original files. Please help!!!