SAVE THE VMI FILE AND THE VMS FILE TO THE SAME DIRECTORY WITHOUT RENAMING THEM !
YOU NEED THE VMI FILE AND THE VMS FILE, BOTH ARE NECESSARY AND CAN'T BE USED SEPARATELY !
The VMI file only contains file's info (size, name, etc...),
as for the VMS file it contains savegame's data
or else, you can save only the DCI file which contains both info and data in one file
in the format used by Nexus memory cards
if you want to rename the savegame you can edit the name in the "Filename" field before downloading the file