Unable to format Sandisk Ultra SD HC I memory card (30MBps)

It is unable to open the SD card in the computer as well as other devices. “SD card needs to be formatted” message appears. On trying to format “Windows was unable to format” message appears .

Sounds like it’s defective. Retrun it to where you bought it (for a refund or exchange) or contact SanDisk directly for a warranty replacement.