Thanks, I'll do that.
I've been researching ways to backup a pfsense installation as a clone disc image and it isn't easy. There was a mistake in my post because I'd backed up a flash drive 250Mb instead of the pfsense hard drive when the actual backup size without free space is 1.2Gb for a virgin install and 4Gb plus with packages, caches and logs backed up. Once I discovered my mistake I tried again. The only true backup is one which backs up then a restored disc image runs without errors or crashes. I only found 2 windows GUI apps that claim to backup freeBSD format - Clonezilla and Acronis True Image. I started with the 2.4 beta and Clonezilla wouldn't even see the hard drive(?) Acronis 2012 wouldn't see the freeBSD drive either. However, Acronis TI 2016 does see the pfsense hard drive as 3 partitions when run as the ISO on a bootable pendrive. I had limited success trying to recover from the 2.4 beta backup clone with pfsense stalling during boot.
I then installed pfsense 2.3.4 stable, repeated the backup of 2 partitions as 'copy sectors' but exclude free space and successfully restored from the backup .tib image I'd saved on a 16Gb pen drive. Acronis 2016 has options to save to a local (usb drive), a hard drive on the home network or a NAS drive. I was curious about this but I'm now pretty certain Acronis TI uses its own drivers with the NIC interface and is completely detached from drivers runing pfsense. It must do this to be able to write back the saved drive image.
I need to go further installing pfsense packages to see if I can still get a perfect backup of a pfsense hard drive across the LAN. If it works, an Acronis 2016 local backup/restore can be done offline independent of an internet connection for the download and integration of packages using the built in backup xml file. For the moment I'm reverting back to 2.3.4 amd 64 stable version, although I miss the keyboard 'choose and test' built into 2.4 beta.
This disc clone backup method needs more testing, but I'm cautiously optimistic I can get it to work.