Can the Rasperry pi be connected to a USB PC so that it is recognized as a flash drive or hard drive?

Question

Hard disks

In general, there was an idea to make, so to speak, pocket network storage with the ability to connect to a PC without a network,
is it possible that the Rasperry pi would provide a directory or an entire hard drive connected to it via USB in much the same way as android does?

Answer 1

as HDD, apparently, it is possible , but it is unlikely that you just
see this for the task https://www.cnet.com/how-to/raspberry-pi-as-cheap-...

Answer 2

I don't know if the controller has the ability, but in fact NO . Raspberries are quite voracious and 500mA will not be enough for her. And this is the USB 2.0 standard. Computers often do not give so much.