Do you know that September’s Security Maintenance has been release for the international variant of Galaxy Note 4 as well as Galaxy Note Edge (In Europe). Report says that the upgrade has brought up a handful of patches that would make the mentioned devices more stable and secure. The upgrade also explains about the different compatibility for Samsung Cloud that would allow you to save data in a secure place.
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Talking about the Samsung cloud, it is such a prospect that would provide the users with 15GB free storage. As it has been said, one can use it to store backups like written documents, pictures, audios, videos and many others that you want to.
You can make the update either through OTA or manually. For manual upgrade you need to follow few steps and these are; first of all got to settings and then about the device followed by software update and the update now. For this you need to have at least 50% of battery charged.
On the other hand for OTA update, you need to wait until a push notification comes to your mobile to update your software.