Check the Upgrade Path: Do not jump multiple versions at once without verification. Use the Fortinet Upgrade Path Tool (login required) to see the mandatory intermediate versions for your specific model.
Click the blue arrow (or the filename) and select "Download now." fortigate firmware download install
Select Product and Version: Choose FortiGate, select the Download tab, and navigate to the directory for the desired FortiOS version. Check the Upgrade Path: Do not jump multiple
Navigate to System > Firmware (or System > Fabric Management in newer versions). Click Browse or Upload Firmware. Select the .out file you downloaded. If unsure, use the vendor’s upgrade matrix in
as the product and browse the folders for your desired version (e.g., v7.0 or v7.4). Download the Image : Locate the
Go to Log & Report > Events to ensure there are no "File System Check" errors or configuration update failures. Pro-Tips for a Smooth Upgrade