When I move files to sd card they are blank and apps won't work after moving to sd card.

What files exactly are you trying to move and how are you moving them? If you selected "Move to card" option from the apps, they should work fine.
 
It don't. No matter if I move or copy it will show moved but they are always empty even when I set camera to store there instead of internal it keeps going to internal. Its a 64 gig ad card and I have a LG fiesta2. Is it to big or just a bad as? Do I need to replace or can it be repaired?