I have about 500mb of songs I want to transfer to my PSP (320kb/sec) and when I do...usually...it's a '5 minutes remaining' thing, so I go do some chores, come back, it's done.

However today, same USB slot as normal, I got the old songs off and got ready to copy new ones on and it said 100 minutes remaining, then 50, then 30, now it's stuck at 30 even though the bar is going by. Is Windows lying or is something up?

I have this mem stick: