This is an original Puppy feature enhanced in Fatdog64-600.

For multisession save, any files dropped in /archive/ will be saved to the
multisession device but they will not come back when the system is boot next
time (except this file). 

Instead of being merged and saved in the usual SFS files, all files in 
archives will be saved into their own folder in the multisession device named
$savepath/archive/2012-07-02T22-03+0000 where:
- $savepath is the path of the savefile (usually blank)
- 2012-07-02T22-03+0000 represents the time you shutdown

So you need to mount your multisession device to be able to see these
archived files.

Note: /archive will only keep non-hidden files, i.e., files that don't start
with a period / dot. This is done on purpose so that you should always be 
able to see the archives files easily.
