.SNA File Extension
File Type 1Drive Snapshot Primary Backup File
What is an SNA file?
Virtual disk format used by Drive Snapshot, a program for creating differential backups; can be mounted like a physical disk when opened with the Drive Snapshot program.
File Type 2NO$GBA Snapshot File
.SNA File Association 2
Game file created by NO$GBA, an emulator for Nintendo DS and Game Boy Advance handheld game systems; saves a snapshot of a running game and can be loaded to resume gameplay at the exact spot that the snapshot was taken; requires the original ROM (.NDS or .GBA file) that was used to create the snapshot in order to load properly.