Hello Boki_Srb, these are [Only registered and activated users can see links. ], although as you recommend, it does not seem to be possible to choose between PC mode and mass storage mode. Please tell me if you would like to view the contents of any of these menu options.

On the possibility of directly running the WinCE shell environment from the sd, I have tested the works published by @Costas3850 that I was able to download, without positive results, I guess this device will need a specific job for it, I will send a [Only registered and activated users can see links. ] to @Costas3850 for if possible, to know your opinion.

Open the device, examine its board and flash a firmware....... ufffff