sandisk memory card not working

suddenly my 8 gb sandisk memory card not detercted by both of phone and pc. can any one help me what to do

if it used to work on both and it is no longer being recognized on either device it is likely a bad card and would need to be replaced. 

How do u connect it to ur computer?

is it through ur phone or adapter or SDHC card reader??

Do u get any error message when u connect it or is it simply not detected??