My sandisk memory card of 4gb shows 0 bytes how do i format?????

Sometimes when a flashmemory stick or USB external hard drive fails because it was not removed fromthe USB port properly. If the device is removed byjust pulling it out of the USB port, it can cause the flash device to fail, youmust click on the Safely Remove Hardware icon on the Task Bar and select thedevice you wish to remove and only do so when instructed to do so When the flash memoryUSB hard drive device appears to malfunction it maybe possible to restoreit by reformatting it. Insert the flash or USB hard drive into the USB port then Click on Control Panel - AdministrativeTools - Computer Management - Disk Management. Then right click on Disk 1removable drive and click Format. After the flash drive has been formatted itwill indicate that it is Healthy.