#Create a mass storage device driver install
#Create a mass storage device driver serial
#Create a mass storage device driver software

This comes down to how USB works, you see whenever two things are connected with USB there is all ways a USB host and a USB device and never the twain shall switch places.

Raspberry Pi Zero вЂ“ Programming over USB! (Part 1).

Turning your Raspberry PI Zero into a USB Gadget.

#Create a mass storage device driver serial

Giving The Pi Zero USB, Ethernet, And Serial Over USB.

Raspberry Pi Zero as Multiple USB Gadgets.

Raspberry PI Zero Dongle With Power Switch.

Looking into things like Pi-based Seafile, Syncthing, SugarSync, and OwnCloud servers should get you started.ДЄ few useful guides on the Pi Zero as a USB Gadget: From the Pi's perspective, it's just acting like a fileserver/sync server, so any similar tutorial should get you started. There should be lots of programs and projects in that direction. MTP has severe performance issues ( Reddit, XDA, HowToGeek, Reddit) so I suggest the networking approach. You'd either start with MTP, or wind up with something similar. Trying to use USB Mass Storage would be a bad idea you would have to write or rewrite a driver-level adaptation between USB Mass Storage and the Pi. There are many networking protocols and cloud providers available. Networking both of those links will be the easiest way to get the job done. The Pi Zero W has builtin Wi-Fi, so could even connect directly to the cloud/network provider. The closest solution to the OP's request is to use a networking protocol between the Pi and the host PC, and then some other form of networking protocol from the Pi to the cloud/network provider. The Pi Zero and Pi Zero W are now available and support the Gadget interface (, ) allowing several different profiles, including USB Mass Storage and virtual networking.

#Create a mass storage device driver software

Access to files in the cloud may be possible by mounting virtual storage with cloud drive or similar software and encryption with TrueCrypt or EncFS - passwords would be stored on the SD card of Raspberry Pi only but one could access the storage with any computer without having to type in a passphrase on a untrusted machine. The Raspberry Pi USB bridge should also be able to encrypt/decrypt files on the fly, so one could store files encrypted in the cloud and access them on any device like a normal USB drive.Д®dit: Existing products with similar but limited functionality include Wireless Media Stick and USB-over-Network.

#Create a mass storage device driver install

You could access cloud storage hosters with any computer (including black box media players) via USB without having to install any additional software on the computer.

The Raspberry Pi would act as programmable bridge that map directory listings and file accesss to request to a cloud storage. The computer should only see a normal USB stick to read and write files from. I thought about the following layout for an ' USB cloud stick': Computer |Raspberry Pi| Cloud, NAS etc. How can the Raspberry Pi emulate an USB storage? The easiest application was to directly access the SD card via USB, but one could also provide acccess to files via Ethernet. USB storage devices, such as USB sticks and harddrives, are common to attach external storage to any kind of computer.