Memory Card

My computer is saying my memory card is full yet I haven’t added anything to it.  Also when I try to download songs to it, it comes up error. 

Products: Sansa 4 GB Fuze

Memory Card: 4 GB Sandisk Micro SD

Any thoughts or suggestions would be appreciated.  Also got my other problem fixed, with the songs skipping. They were downloaded in the wrong format.

Your computer says it’s full? Right-click and Explore it. What’s on it?

Try to format the memory card. The same thing happened on mine. Use a memory card reader, and format it. Should take a few minutes, and then shoudl work