can usb-c flash drives be externally powered with the end that isn't being used
USB-C flash drives are typically designed to draw power directly from the USB port they are connected to, whether it's a computer, smartphone, or other device. They do not usually have a provision for external power input, as the USB-C standard itself is capable of providing sufficient power for the operation of flash drives.
If you have a USB-C flash drive with a dual connector (e.g., USB-C on one end and USB-A on the other), the unused end does not serve as a power input. Both ends are designed to connect to host devices, and the flash drive will draw power from whichever end is connected.
In summary, USB-C flash drives do not require or support external power from the unused end. They are designed to be powered by the host device they are plugged into.