No, both units are NTFS.
Perhaps I didn't explained the bug clearly. I didn't lose the file when I did "cut & paste", I just checked the drive with Recuva, and I saw that the application didn't manage properly with large files.
Hi, I'm using Recuva v1.12.291 and Windows XP SP2
It seems that Recuva has problems with large files (> 4 GB). When I try to recover them (just after cut&paste to another drive), the application shows that the size of the file is 0 KB and it tags the file as Unrecoverable always.