Memorex MMP8565 MP3 Player "keeps saying sd card ready" Questions

...sd card on my Sansa E250, but it will not let me add music to it. It says i am out of space, but I only have 1.9gb of info stored on the sansa. Please help. Hi, 1. Make sure that you have Windows ...

...KEEPS SHUTTING OFF SAYING MEDIA FULL, SHUTTING DOWN. WHEN I PLUG IN INTO THE CPU WITH THE USB IT WILL DETECT IT FOR ABOUT 30 SECONDS AND THEN IT DISCONNECTS. PLEASE HELP!!!!!! reinstall the firmware, ...