An error occurred while saving the commentBram Kaandorp commented
Just the other day I plugged my USB stick into my phone, and it prompted me to allow Solid Explorer to access it (I forgot the specific wording). I did so, and after that the USB stick has its usage displayed beneath it in the app.
After plugging it in on another occasion, I didn't get the prompt, and SE didn't display data usage beneath the USB stick.
I have the USB OTG plugin installed.