micro sd 8GB 4s can't be read anywhere

Accidentally my brother deleted the system files of the memory card which remains hidden and after that iam unable to access my micro sd neither in mobile nor in computer. Please do help me by giving a way to retrieve my micro sd.

There are no hidden or system files on a memory card, micro or otherwise. It is simply a blank flash memory storage space. You should be able to recover it by formatting it, but if a computer is not ‘seeing’ it, you may have to buy a new card. Luckily, flash memory cards are very inexpensive.

Can you try another PC and see if it makes a difference? How about reloading the driver here too? 

What “driver”? :confounded: