What is an NMM file? An NMM file is a memo backup file created by Samsung Kies, a program that allows Samsung smartphone and tablet users to back up files stored on their mobile devices. It contains a copy of memos created using the Samsung Memo app, which previously came pre-installed on select Galaxy phones. NMM files can no longer be opened, as no Samsung programs support them.

More Information Samsung Memo was a note-taking application that came pre-installed on some Samsung Galaxy phones, such as the Galaxy Trend Plus and S7, and other devices. If a Samsung Memo user wanted to back up their memos on their PC, they could do so by installing Samsung Kies on their PC, connecting their mobile device to their PC, and using Kies to produce a memo backup file. Memo backups contained a copy of all a user's memos, and they were saved as NMM files. Eventually, Samsung discontinued the Samsung Memo app in favor of Samsung Notes. For a while, users could use Samsung Kies, Samsung Smart Switch, or Samsung Notes to migrate the memos contained within their NMM files to Samsung Notes. At this point, however, no Samsung programs support the NMM format.