My PC does not recognize my memory stick

[malihipour]

Hi there,
I have two memory sticks and they were working without any problem. Today I plugged them in a computer in a public area and after that they do not work anymore. Not sure what happened for them. Can anybody help me to recover my data?
Thank you very much,
Ali

 

[profkefah]

you tried it on another computer
when you attach them any message pop up

 

[malihipour]

I tried it on different computers. There is no message!

 

[profkefah]

they may be defected