I don’t mean using apps to communicate with the device. I mean mounting the internal storage or sdcard just as you would any USB stick or USB drive. My OpenBSD laptop can see the device when I plug it in, but the device does not present its internal storage or its sdcard as a mountable volume. By contrast, my Fiio X1 2nd Gen presents its sdcard as a mountable volume and I’m able to mount it, read, write, and erase files just like I had plugged the sdcard into a card reader. Having to use a special program on a specific OS, or otherwise remove the leather case, remove the sdcard, plug the sdcard into a card reader, makes it a lot more complicated just to add and remove music on the device.