The function SysCopyObject()

In theory you can use the function <SysCopyObject to copy a file with a 
long name from an HPFS formatted drive to a FAT formatted drive. In real 
life it works sometimes and sometimes not. This seems to be a bug. 

<SysCopyObject does not overwrite an existing file. 

(see also Copy a file from HPFS to FAT and vice versa for a workaround)