What should I look to be replacing, if anything?

What should I look to be replacing, if anything?
Hello,

ANSWERS:

"This sounds like a hard drive issue. Of course you might also have to replace your battery again. Neither one of those jobs is difficult nor is it very expensive. The 4th gen is a good iPod and I would definetly fix it. iPod 4th Generation or Photo Battery Replacement

iPod 4th Generation or Photo Hard Drive Replacement"