SD card blank/unknown format

[Qcom]

Hello, got my evo latest ota rooted and using OMJ's rom. At first everything was fine until i went to add a new boot animation/sound with root explorer. the boot animation went fine, but when I went to put the mp3 file in, I got the SD card blank error, since then i've removed the old one and gotten another 8 gig card I had lying around. I've tried to atleast make the old card readable in windows but no luck, nor have I seen anything useful searching here/google. Is the card done for then? Thanks.