Question: Missing Memory Card
 

I have this iPhone clone with model R880 (see profile here).
So I have a problem with the memory card. It was showing before in the Phone and at the PC but after transferring some files. The memory card access was gone!

At the File Manager of the Phone only the Phone Memory is shown. It was showing two memories then, from the Phone and the Card.

I also noticed a padlock key, on the top bar of the iPhone clone, maybe it has something to do with that.

Please help!
Also, I forgot to safely remove the memory card from the PC for about two times.

Updated: Now, when I turned off my cellphone and attach the USB, it detects the memory card but it cannot be opened. It says "Please insert a disk into drive F:"