Hi everyone!
I have one way to move save file from USB to MC for PS2 Slim model 7x or 9x.
First you need
uLaunchELF. One new CDRW, One USB <= 1Gb format = FAT.
Now,
Step 1: Open Save File by
PS2 Save Builder
Step 2: Choose all file on left table, right mouse -> extract. (it appear name of file is "not use" but don't rename, keep it and extract)
Step 3: Make new folder and rename = name of save file (suppose in this case: BESCES-51719GAMEDATA).
Step 4: Move all file you extract before to new folder and copy this folder to USB.
Step 5: Burn uLaunchELF into your CD. Burn image file before you unrar.
Step 6: Open disk by Ps2. In menu, press O and go to mass:/ (USB), choose save game and press R1 -> Copy. Press /_\.
Step 7: Choose MC (slot 1 is mc0:/, slot 2 is mc1:/), Press R1 -> mcPaste. Done.
Have fun
. I have little English, sorry
.