Attention Please:

When you receive the firmware,please

1. Clear the cookie of brower first.

2. Unzip the file of firmware.

3. Read the manual first and upgrade it.

4. Keep power on during update procedure.

And all configuration you saved before will be lost after firmware update.
Therefore,please back up the configuration before firmware update, please refer to the following methods:
1: Complete the configuration of switch and save it before upgrading the firmware. Path: Tools > save
2: Back up the settings, export the configuration file and save it, upgrade to a new version, and then re-import the configuration file for recovery. Path: Tools > Configuration Backup

>>One more thing:

Please double check if the firmware you download matches the model of switch you have. If you upgrade it with wrong firmware, it will cause crash of switch systems. It won't be recovered. So please check it again and again when you are ready to update it.