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# Upgrade Options

The **Upgrade Options** view lets you configure parameters for firmware upgrades.

## Firmware image extensions

The firmware image extension setting defines which type of image file to use for upgrades.

^ Item ^ Description ^
| `.y2` | UBIFS Image version 2|
| `.y3` | UBIFS Image version 3 |


## Online Upgrade

The online upgrade settings define where the online upgrade images are located.

^ Item ^ Description ^
| URL for file with latest image filename | URL to a text file containing the latest image filename on the server. |
| Upgrade URL base path | URL to directory containing upgrade image files. |