Experience needed in SSH for modifications -- 2

I have a SSH form using FSW and timer, and it needs modification for zip & syncing

1).
I need to make files a zip file on host only: No temp files w/files mapped in memory

Load a file into a memory mapped file > Zip memory mapped file > Upload memory mapped zip file
Download zip file into a memory mapped file > Unzip memory mapped file > Save memory mapped file

2).
Also need to change SSH syncing events: Edit file system watcher and timer events

FSW should sync files and change events and timer should sync host change files

I need this to get checked as well as how it were syncing, which has two phases:
App start: if user is new (without files) a zip of the host's sync folder downloaded
( this method works but it seems that the zip file is lacking some empty folders )
App start: if the user isn't new (has sync files): recursions get compared for a sync
( this has no evident problems )
App runtime: change events are picked up by FSW; the timer syncs with the SSH host
( this syncing doesn't leave change files--it seems it doesn't work as expected now )

It's a relatively small source code on one form in vb.net .NET framework latest SDK

Must have private IP VPN and accept award to be given app and server credentials