How to put an HD video (mkv) on a USB drive

If you are on XP, here is the procedure:

In your computer, right-click on your USB key and then on "Properties".

Then go to the "Hardware" tab and select your USB key from the list, then click on "Properties".

There, go to "Change settings", then navigate to the "Policies" tab and check the line "Better performance".

Close all windows by clicking "OK".

Now go back to your computer, right-click on your USB key and choose "Format". Under "File system", which should be set to FAT32, change it to "NTFS". Then uncheck "Quick format" if it is checked and start it. When it is finished, you should be able to transfer your file onto it.