Originally Posted by
trilerian
For the USB C issue... USB C requires something called power delivery "pd" to negotiate the voltage and current to be supplied. My best guess is the resistors are not there in the charger to "fool" the pd into supplying the 5V. When using a USB C to USB A adapter, the USB A part has a resistor (around 56kohms) on the current line to trick the device giving power to it to give power, or if using a dumb power supply to trick your pd enabled device into charging on that dumb device. So... If you are using a USB C to USB C, just power the charger off your power supply and you can access the folder. If you are using USB C to A it should work, so long as the adapter has the resistor in it. That said, I would not power it externally while connecting to USB A. I don't have confidence that they built in protection for that use.
Most devices with an USB-C connector for only data communication just use the USB-C connector only to get along with the market, the whole interface behind it is just as any USB2 or even USB1. Also devices that has a USB-C connector for only power are most not designed to do a proper communication on USB-C specification to activate the charger. Like with my Retrogames The Spectrum (remake of the Sinclair ZX Spectrum), one of the most written complains in its FB group is that it will not power up because with the USB-C power connector they forgot to design it with a power/voltage activation for any USB-C charger.