Is it possible to use a PC as a external drive via USB?

I have a bluray player that has a USB interface that allows me to plug external hard drives and pendrives for me to play movies or music files.

I was wondering if it's possible to have the PC or notebook or any other computer-like device using a USB-USB cable and make the bluray player detects this as an external drive.

Note: I'm using a bluray player as example but it can be the same for DVD players, TV or sound sytems.

I don't know of any easy way to use a laptop/desktop as a mass storage device. One way to have the player read the drives is to use an inexpensive external USB drive reader, although you have to open the casing or remove the drives to plug them into the reader.

Personally I would just purchase an external drive. Also make sure the device can read NTFS filesystems before spending time on this.

Yes there is good sir, here it is exactly what you want:

http://www.hardwaresecrets.com/article/Connecting-Two-PCs-Using-a-USB-USB-Cable/248/1