Many firmware pages offer two files:
Do not treat firmware as an afterthought. Establish a quarterly schedule to review your FortiGate firmware, map out upgrade paths six months in advance, and always verify your support contract’s expiration date. There is no panic quite like discovering a critical zero-day vulnerability, only to find your download path blocked by an expired support license. fortigate firmware download path
If you bypass this, you will receive a "Invalid firmware file" error during installation. Many firmware pages offer two files: Do not
: Navigate to the Fortinet Support website. You will need to log in with your Fortinet account credentials. If you don't have an account, you can create one for free. If you bypass this, you will receive a
How to verify FortiGate Upgrade path to u... - Fortinet Community
To find the exact file for your hardware or virtual machine: