Hardware move with 2x SG450 with HA

Dear all,

at the moment we are planning to move out 2x SG450 (site A) with enabled HA to different racks with different switches (site B) in our datacenter. Because of routing issue, it will not be possible, that the VLANS for internal, external and heartbeath are available on site A and B at the same time.

So my plan is the following:

1. Shut down passive node1
2. Shut down active node2
3. Change routing from site A to site B
4. Move UTMs to different racks
5. Start up old active node2
6. Start up old passive node1

Can i run a backup do USB or something like that to be quciker in restore if needed?

I hope that should be it or is there something to consider i haven't thought about it yet?

Best regards
Alex