.3FS File Extension
File TypePuppy Linux Save State File
This file is saved in a binary format, which requires a specific program to read its contents.
What is a 3FS file?
File containing a file system snapshot saved in the third extended file system (EXT3) in Puppy Linux; stores the state of the file system at a certain point in time and can be used for resetting the file system back to that state; saved to an external file system partition, since Puppy Linux can run off of a CD or .ISO file.