diff --git a/.gitmodules b/.gitmodules
index f7fce88..c05a1ce 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "external/umac"]
 	url = https://github.com/evansm7/umac
 	path = external/umac
+[submodule "external/no-OS-FatFS-SD-SPI-RPi-Pico"]
+	path = external/no-OS-FatFS-SD-SPI-RPi-Pico
+	url = https://github.com/carlk3/no-OS-FatFS-SD-SPI-RPi-Pico.git
diff --git a/external/no-OS-FatFS-SD-SPI-RPi-Pico b/external/no-OS-FatFS-SD-SPI-RPi-Pico
new file mode 160000
index 0000000..0a3531f
--- /dev/null
+++ b/external/no-OS-FatFS-SD-SPI-RPi-Pico
@@ -0,0 +1 @@
+Subproject commit 0a3531fdccec9b802fb6b48c4f16d8ee2b63979c