I've got a hidden folder in .Trash on my flash drive called 501. Inside it, there are all kinds of programs. After re-reformatting the drive I had 2GB missing of the 8Gb. That's how I came across this. I checked the file permissions, tried sudo, I can't remove it. I was able to navigate inside the folder and empty the trash. It then dropped down to 2.7Mb of space, but when I add to the drive, then delete, the files are still stored in this 501 folder. Even after re-re-reformatting.
Is it possible to delete this folder? Or is this 2.7Mb really necessary to make the drive work? Why would I have to manually go into the folder and empty the trash after I already delete the files? It's bothering me because it seems to behave like a sophisticated virus.