Confusion over firmware upgrade path for fortigate 3240c

[Spartacus1988]

We are in the process of upgrading one of our fortigate, but we are not sure which is the best method. Having looked at the online link http://cookbook.fortinet.com/sysadmins-notebook/supported-upgrade-paths-fortios/5/  We are unable to determine the exact path we need to take. 

Our current Firmware is  : v5.0,build3608 (GA Patch 7)

Looking under the upgrade option on the firewall, we are presented with 

V5.4 GA Patch 1 (Build1064)

V5.2 GA Patch 9 (Build0736)

V5.2 GA patch 8 (Build0727)

V5.0 GA patch 13 (Build0322)

V5.0 GA patch 12 (Build0318)

Which option or which upgrade path shall i choose, it looks a bit confusion 

Any help will be appreciated 

[SCSIraidGURU]

Your on 5.0 GA7.   I would be very careful upgrading to 5.4.  Backup each time.  I tried jumping multiple releases and caused issues.  You will want to read each release note about gotchas.  I would get the 5.0 GA release that is closest to GA 7 and upgrade in baby steps.   Even Fortinet techs have told me on my 800C, not to jump more than a few releases at a time.   Can you get closer than GA12?  I would make sure you have good backups of the device each time.  

[neonbit]

The supported upgrade path from 5.0.7 to the latest (5.4.3) would be:

5.0.9 > 5.0.11 > 5.0.14 > 5.2.10 > 5.4.3

[emnoc]

I'm with neon bit on this,  the rls clearly tell you the upgrade patch and where you can jump from. Backup the cfg file, push a fortiguard update when your all done and monitor logs, firewall policy counts,etc.....

btw: I would not put a 3240C in a prod-env on 5.4.3. We have  FGt3240C still on 5.2.9 and soon to be  5.2.10

Ken