Help my evo messed up

[OverLord Dan]

HeyHey. Every 1 me evo is messed up badly
I have nothing on my SD card and it says that I used up 7.4GB. And I got 5mb left what shuld I do it wont let me.download anything

 

[akazabam]

If you connect it to a computer, and mount it as a disk drive, does it show any files? What about if you check disk usage while it's connected? What does it show? Back on the phone, you can use an app called DiskUsage to show what is on the card, and help remove stuff. Of course, if you truly have nothing on the card, you may just need to format it.