Open UPG File
The UPG format and extension files are usually firmware or software update files used by hardware devices, such as routers, modems, Bluetooth devices, and audiovisual equipment.
UPG files are used to apply bug patches and new features to a product.
You must consider that UPG files are specific for each hardware. A wrong application of an update using a UPG file can make your device unusable, therefore you must be very careful when opening and working with these types of files, preferably consulting technical documentation.
That said, there is no universal standard for UPG files, since each manufacturer has its own specification that must meet their own requirements.
You should make sure, as much as possible, that you download the UPG files from the device manufacturer's website.