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diff --git a/tmk_core/protocol/usb_hid/USB_Host_Shield_2.0/examples/testusbhostFAT/README.md b/tmk_core/protocol/usb_hid/USB_Host_Shield_2.0/examples/testusbhostFAT/README.md
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+This small sketch tests the USB host shield mass storage library.
+
+__Note:__ This will not run a Arduino Uno due to the limited ram available in the ATmega328p.
+
+The Arduino Mega (ATmega1280) and the Arduino Mega 2560 (ATmega2560) are confirmed to work with this test code.
+
+To compile this example you will need the following libraries as well:
+
+* [xmem2](https://github.com/xxxajk/xmem2)
+* [generic_storage FATfs](https://github.com/xxxajk/generic_storage)
+* [RTClib](https://github.com/xxxajk/RTClib)
+
+The following shield is recommended for larger projects: <http://ruggedcircuits.com/html/quadram.html>.
+
+You may use the bundled [Makefile](Makefile) to compile the code instead of the Arduino IDE if you have problems or want a smaller binary. The master makefile is bundled as a submodule, but can also be downloaded manually at the following link: <https://github.com/xxxajk/Arduino_Makefile_master>.
+
+To download the USB Host library and all the needed libraries for this test.
+
+Run the following command in a terminal application:
+
+```
+git clone --recursive https://github.com/felis/USB_Host_Shield_2.0
+```
+
+If you want to update all the submodules run:
+
+```
+git submodule foreach --recursive git pull origin master
+```