diff --git a/samples/subsys/usb/mass/boards/adafruit_feather_nrf52840.overlay b/samples/subsys/usb/mass/boards/adafruit_feather_nrf52840.overlay
index 9f71ca7a3d321f..5112c025af316f 100644
--- a/samples/subsys/usb/mass/boards/adafruit_feather_nrf52840.overlay
+++ b/samples/subsys/usb/mass/boards/adafruit_feather_nrf52840.overlay
@@ -18,3 +18,12 @@
 		};
 	};
 };
+
+/ {
+	msc_disk0 {
+		compatible = "zephyr,flash-disk";
+		partition = <&storage_partition>;
+		disk-name = "NAND";
+		cache-size = <4096>;
+	};
+};
diff --git a/samples/subsys/usb/mass/boards/nrf52840dk_nrf52840.overlay b/samples/subsys/usb/mass/boards/nrf52840dk_nrf52840.overlay
index e05776cad08b0d..fce982fff44ac8 100644
--- a/samples/subsys/usb/mass/boards/nrf52840dk_nrf52840.overlay
+++ b/samples/subsys/usb/mass/boards/nrf52840dk_nrf52840.overlay
@@ -18,3 +18,12 @@
 		};
 	};
 };
+
+/ {
+	msc_disk0 {
+		compatible = "zephyr,flash-disk";
+		partition = <&storage_partition>;
+		disk-name = "NAND";
+		cache-size = <4096>;
+	};
+};
diff --git a/samples/subsys/usb/mass/boards/nrf5340dk_nrf5340_cpuapp.overlay b/samples/subsys/usb/mass/boards/nrf5340dk_nrf5340_cpuapp.overlay
index 0204fec1e468af..e529ffe9705443 100644
--- a/samples/subsys/usb/mass/boards/nrf5340dk_nrf5340_cpuapp.overlay
+++ b/samples/subsys/usb/mass/boards/nrf5340dk_nrf5340_cpuapp.overlay
@@ -18,3 +18,12 @@
 		};
 	};
 };
+
+/ {
+	msc_disk0 {
+		compatible = "zephyr,flash-disk";
+		partition = <&storage_partition>;
+		disk-name = "NAND";
+		cache-size = <4096>;
+	};
+};
diff --git a/tests/subsys/fs/fat_fs_api/boards/native_posix.overlay b/tests/subsys/fs/fat_fs_api/boards/native_posix.overlay
new file mode 100644
index 00000000000000..1be4fd320713be
--- /dev/null
+++ b/tests/subsys/fs/fat_fs_api/boards/native_posix.overlay
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2022 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&flashcontroller0 {
+	reg = <0x00000000 DT_SIZE_K(2048)>;
+};
+
+&flash0 {
+	reg = <0x00000000 DT_SIZE_K(2048)>;
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		flashdisk_partition: partition@0 {
+			label = "flashdisk";
+			reg = <0x00000000 0x00200000>;
+		};
+	};
+};
+
+/ {
+	storage_disk {
+		compatible = "zephyr,flash-disk";
+		partition = <&flashdisk_partition>;
+		disk-name = "NAND";
+		cache-size = <4096>;
+	};
+};