I used to use the same memory SD card in my laptop, But, now it is not working. The icon does not appear on "COMPUTER". What can I do, so I can still use the same memory SD card? Thanks
Could you find it in "Disk Management" or "Device Manager"?
If you could find it there, you could firstly recover your data on this memory card at the aid of a memory card recovery freeware and format it to see whether it could work as before. Otherwise, you'd better buy a new one.