Strange event with 2 usb disk on my ubuntu

[Gargamella]

I was sharing music with my friend (laptop to laptop by usb flash drives)
I put mine in (512 MB) and then I loaded my music on his pc...
Then he passed me a document by his flash drive (128MB)

NOW everytime i plug my usb drive I see it has 128MB of disk space!!!

what do you think it may had happened?

What should I do?

[Gargamella]

RESOLVED
now it's ok
It showed 128 MB remaining but there were 300MB on the .trash folder

sorry

[Steveire]

Hmmm, my first thought on seeing the title was the issue that UUID idea in fstab was designed to solve. I suppose clearing the trash works too...