DSGW-210B FUOTA feature

I just want to make sure you expose the FUOTA feature on the embedded Chirpstack of your device. Please confirm what is the maximum file size you support using this feature for firmware updates

For DSGW-210B, we reserve 20 GB of free space for customers, so we support ota files below 20 GB.

may we know why Dusun is not updating their DSGW-210B to work with helium anymore ?
it is totally scam, to advertise the device as helium router and then after months it does not work anymore