Memory card not working

Put the memory card in a pc and change its properties - remove the Read only option. If this doesn't fix it then the card is nearing death and has locked itself to allow you to extract the data from it before it fails completely.

if you have a multi card reader there should be no proble or try using the usb cable for your samsung camera

Your memory card reader lacks SDHC compatibility. You must either update your pc card reader to one which is compliant with SDHC or use a cheap external card reader to do the job.

SD and SDHC cards look the same and fit the same slots, but they have significant technical differences which older readers cannot handle.

you do one thing to install dual o.s in your system and solve your problem

I have the same problem once i reinstalled windows and it worked for me.

your must connect your phone with the card in it to the pc via cable provided with the phone and use the software provided.
only this way the music will be recognized be the phone

Try connecting MS directly to the PC (Via an adapter, if necessary)

It may be that your laptop does not support flash drives of that size. Many older PC's/Laptops have firmware drivers that limit to about 2-4 Gig depending on year of manufacture.

if you did not change or put any password, just try to use the generic password as 000000 or 123456, if you can connect your phone to the pc, try to download all your files from the memory card to the pc and reformat your mem card

take the card out and put in back in. it worked for me,