Markk
I purchased the Samsung Galaxy S3 because I could expand the memory, and this card is how I did it. The phone came with 16 Gb, and this cranked it up to 80 Gb for only about $65 more (buying this much memory already installed would have been much more expensive). I have about a half dozen albums, around 40 or 50 TV episodes, and maybe 16 full length movies on the card, with room to spare - very nice when sitting on a long plane ride! The only problem occurred the day after I put the card in - it gave me an error message, but when I removed and reseated the card, no problem, and none in the months since then.