I agree with SamSV. When I purchased the note 10.1 when they were first released, samsung promised to keep the tablet up to date for at least 5 years. One update after the initial release and that never happened (just a lot of broken promises.)
beyond this: I have since purchased the S5 (mistake) which after just over a month of use, all the pictures and videos (no other files) disappeared. This is obviously a software issue, so I TRIED to contact samsung "support" both through phone and e-mail. On the phone "support" transferred me to the "tech support" who never answered (I sat on hold for 2 hours before I gave up.) Their e-mail "support" only sends a generic response, with no way to respond (contact information is fake, mailer-daemon.)
I had this same issue with my old LG phone, after trial and error, what I found out was that if the SD card is pulled out with out being "ejected" or using a Chinese SD card, the OS will "reformat" (not sure if its a delete all or reformat) the SD card and everything on it will be lost. Thank God for Google+ picture backup, all of the music and documents I can get again so no big deal just an inconvenience. The Chinese SD card was cheap, great while it lasted, and then died with in 6 months. Any cards that I bought in the US that are brand name SD cards I still have that are 5+ years old and still work. Now having a non-Chinese SD card, pulling the card out while the phone is on and without ejecting it, putting it in a card reader, copying the contents to a computer then putting it back into the phone would erase the card.
This could be an OS issue but I'm betting it has to do with the reason why every OS states to properly eject the card or USB drive, it can corrupt data still having electricity running to the port.
[bottom line] Unless you need the pen, don't waste your money on samsung mobile products. No updates, no support, means no more samsung for me.
sincerely,
ex-samsung fanboy