diff --git a/build_rootfs.sh b/build_rootfs.sh
index 05ab12a..64f0eed 100755
--- a/build_rootfs.sh
+++ b/build_rootfs.sh
@@ -73,16 +73,10 @@ config_rootfs() {
   echo -e "\nT0:23:respawn:/sbin/getty -L ttymxc0 115200 vt100\n" >> ./rootfs/etc/inittab
   
   mkdir ./rootfs/mnt/onboard
-  echo -e "/dev/mmcblk0p3 /mnt/onboard vfat noatime 0 1\n" > ./rootfs/etc/fstab
-  echo -e "tmpfs /tmp tmpfs defaults 0 0\n" >> ./rootfs/etc/fstab
-  
-  # Prevents documentation from being installed to persistent storage
-  echo -e "tmpfs /usr/share/man tmpfs defaults 0 0\n" >> ./rootfs/etc/fstab
-  echo -e "tmpfs /usr/share/info tmpfs defaults 0 0\n" >> ./rootfs/etc/fstab
-  echo -e "tmpfs /usr/share/doc tmpfs defaults 0 0\n" >> ./rootfs/etc/fstab
-  
-  # Don't store logs (to save space & reduce flash wear)
-  echo -e "tmpfs /var/log tmpfs defaults 0 0\n" >> ./rootfs/etc/fstab
+  mkdir ./rootfs/mnt/external
+  cp files/fstab rootfs/etc/
+  chown root:root rootfs/etc/fstab
+  chmod 644 rootfs/etc/fstab
   
   echo "Configuration done."
 }
diff --git a/files/fstab b/files/fstab
new file mode 100644
index 0000000..c0f4c89
--- /dev/null
+++ b/files/fstab
@@ -0,0 +1,15 @@
+# Data on the internal SD
+/dev/mmcblk0p3 /mnt/onboard    vfat  noatime  0 1
+
+# Data on the external SD
+/dev/mmcblk1p3 /mnt/external   vfat  noatime  0 1
+
+# Prevent documentation from being installed to persistent storage
+tmpfs          /usr/share/man  tmpfs defaults 0 0
+tmpfs          /usr/share/info tmpfs defaults 0 0
+tmpfs          /usr/share/doc  tmpfs defaults 0 0
+
+# Don't store logs (to save space & reduce flash wear)
+tmpfs          /var/log        tmpfs defaults 0 0
+
+tmpfs          /tmp            tmpfs defaults 0 0