CELL PHONE NOT RECOGNIZING SD CARD (MEDIA)

I would:
- connect thru USB the phone to a computer
- create a folder in the computer desktop
- find the phone in the computer, find the internal phone memory
- find pictures, videos, music, and document files in the internal phone memory to copy and paste to the folder created in the desktop. This could be one at a time, a few at a time, or a bunch at a time.
- when done finding, copying and pasting to the desktop folder, open the desktop folder, open the files to verify the files open correctly and are not corrupt.
- once files in desktop folder are verified good, delete the original same files from the phone, the ones copied.
- now find the phone external memory, the SD card and copy files from the created folder to where they can be placed.
- all this is done thru the computer
- once done, set up your phone apps so the app stores any new media in the extrernal SD memory to avoid future filling of the internal phone memory.

Most tablets have an internal "bin" for programs, pictures, and such. When you add an SD card, that's still external, and you can fill up the internal without touching the external card. You can use the file manager to clean up the internal storage.

Your phone can't use the mini SD card as internal memory. Your internal memory has to many apps, and to much data. (pictures, notes and messages) You should clear up the internal memory, by deleting apps and data. Most Samsung apps you can't delete. The modern phones already have apps, exceeding 10 Gb. So if you bought a 16 Gb phone only 5 Gb is left for you to use for apps. I'm sorry, but the SD cards should be seen as an external hard disk, not as internal memory.
If you thought I can buy a phone with less memory, because the SD cards are very cheap and will extend the internal memory, you made an error. New phones from Samsung now get more than 10 Gbyte of apps, you even can't remove. So only about 5 Gbyte is free to use for other apps and messages.
Next phone, take one with lots of internal memory, if you like to install other apps.

its simple, delete all read massages, unwanted photos and music in galary. if it fails go to settings and select restore

Its because your media player library is not getting refreshed. Check whether there is a refresh option in your player settings. Or else you can try any other 3rd party players like Poweramp, which can be downloaded from the Play Store.

NO.
Just buy a new card since trying to fix it may later have long terms effect on the phone

Well if you want to save your pictues that you take to your SD memory card and if your phone automatically does not do that then you would have to manually choose save to SD card when you are taking the picture. If that option does not show up, try going to the memory settings of the phone and changing it so it saves to the phone. But if you are trying to add external pictures to the phone (ie digital camera to phone) you would have to use a micro sd card reader and a computer to do that. If thats the case you just have to connect the sd card to the micro sd card reader and plug that into the USB port of the computer and just drag and drop the pictures you want into them. then plug that sd card back into the phone and you should have the picture in the phone!

Messages are stored on internal memory, not the SD card. Make sure you deleted your sent messages, and cleared your trash if needed. Also make sure pictures are moved to SD card.

Try going to the memory card option on the main menu, then go to 'Removable Storage', then the Zen should either tell you to connect a USB cord or insert a memory card. Try it, if not I dont know.