geminii71 , generally these nano-clones do not need any software to sync with your computer. It works the same as a USB thumbdrive. Just copy and paste music/video files into the player's drive will do.
The only software you'll need is the AMV Tools, available in the downloads section. That's to convert the video files into .AMV format.
Regarding the games, you can't remove them to increase the space, as they are part of the firmware.
However, i'll suggest a complete player format if you haven't done so yet. As majority of players comes with hacked memory. The guide to it is
Here.