Technical Tip: How to verify FortiGate U…
https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-verify-FortiGate-Upgrade-path-to-upgrade/ta-p/193717
7.2.x and 7.4.x Versions: Go to support.fortinet.com and login your account. Go to Download -> Firmware Images and choose FortiGate under 'Select Product'. Click the 'Upgrade Path' button and choose the relevant FortiGate Model and the current Firmware version under 'Current FortiOS Version'. Select the desired Firmware version and the upgrade options will appear. Select the File upload option and browse the firmware image file on your local computer. Follow the prompts to complete the upgrade process. The FortiGate may reboot multiple times during the upgrade. Log into the web-based manager as the admin user.
Go to support.fortinet.com and login your account.
Go to Download -> Firmware Images and choose FortiGate under 'Select Product'.
Click the 'Upgrade Path' button and choose the relevant FortiGate Model and the current Firmware version under 'Current FortiOS Version'.
Select the desired Firmware version and the upgrade options will appear.
Select the File upload option and browse the firmware image file on your local computer.
Follow the prompts to complete the upgrade process. The FortiGate may reboot multiple times during the upgrade.
Log into the web-based manager as the admin user.
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