Damaged sd card

[Firewing]

I have a question, in my status bar my phone says I have a damaged sd card and need to reformat it, if I do that will I lose my nandroid backups? Or are those stored on my phones internal memory?
Thanks
Cara

 

[Tallica]

They are stored on your sdcard in your nandroid folder if using SPR, they are in your clockworkmod>backup folder if using CW, Copy them (and anything else you want to save) to your PC then format the card then copy them back.