I took my 16 gb SD card out of my Galaxy S3 and it will not work in my S4...

Just wondering why my SD card will not work in my new phone... Its very frustrating. I took it out of my S3 last night, and put it directly into my new S4 and it wont mount.. I put in a different card and it worked fine@
.. Any way to retrieve all my photos and apps??

See my reply here: Cosmo 3 not recognizing microSD card old content
It's in reference to a different phone, but the same principle applies - the card needs to be formatted in the phone you want to use it in - and formatting erases everything, so copy the info to your computer FIRST, then format the card, and then copy things back.  Or, as you did, use a different card.  If you want the info form the original card, you'll have to go through the process I outlined above.

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