I'm running F17 64-bit Xfce.
How do I copy files from the hard drive to a USB stick with Thunar?
Either the paste function is disabled or the file looks to be copied, but when the stick is reinserted it's not there after all.
So I installed Nautilus, but the same happens.
I can, though, delete files already on the sticks.
I don't remember any such problems with F16.