microSD card shows low memory

I have an 8GB microSD card installed.  I only have a few hundred megabytes of files on the device, but the computer shows that I am using over 7GB of storage.  Is there a way to fix this?

Thanks.  Does the format do both the internal and external memory?

@timschmits wrote:

Thanks.  Does the format do both the internal and external memory?

Only if you format them separately.