How can I upgrade the firmware of my FGT-101F from FortiOS v6.4.11 build 2030 to FortiOS v7.6.0

Below screenshot from the upgrade path tool located here.

Hello @wangkuowei ,  @wangkuowei

As Jason recommended during the firmware upgrade is recommended to follow the upgrade path so that in case anything breaks you can verify on which version is impacted. Also, you can check the release notes for the known issues and new features based on your network environment.

https://docs.fortinet.com/document/fortigate/7.0.12/fortios-release-notes/289806

Regards,

ametkola