External storage write permissions?

[tracker51]

Hello,

So, I have successfully installed Bluetooth_GNSS on my Pixel 6a.

Likewise, I have successfully added my NTRIP connection data.

Third, I have started my RTK device (Ardusimple with ublox F9P).

Having done all this and pressing the floating button full of expectation ...

... disappointment:

What am I missing? Any help is really apptreciated!

Best regards

tracker51