diff --git a/README.md b/README.md
index dc546e9..e4e22de 100644
--- a/README.md
+++ b/README.md
@@ -28,11 +28,12 @@ A source webhook which uploads SorCam image to Soracom Harvest Files.
 curl \
 -XGET \
 -H "x-api-key:${apikey}" \
-"https://${hostname}/v1/source/soracam_image?device_id=${device_id}"
+"https://${hostname}/v1/source/soracam_image?device_id=${device_id}&upload_directory=${directory}"
 ```
 
 Query parameters
 * device_id: Soracam ID
+* upload_directory: Upload target directory under base path.
 
 You will need SAM user with permissions below
 
diff --git a/lambda/soracam-image-source.test.ts b/lambda/soracam-image-source.test.ts
index d95dc1e..25a7dab 100644
--- a/lambda/soracam-image-source.test.ts
+++ b/lambda/soracam-image-source.test.ts
@@ -42,12 +42,17 @@ describe("Lambda handler", () => {
 
     expect(result.statusCode).toBe(400);
     expect(JSON.parse(result.body).message).toBe(
-      "device is required in querystring parameters"
+      "device_id and upload_directory are required in querystring parameters"
     );
   });
 
   it("should successfully process the request", async () => {
-    const event = { queryStringParameters: { device_id: "testDevice" } };
+    const event = {
+      queryStringParameters: {
+        device_id: "testDevice",
+        upload_directory: "testDirectory",
+      },
+    };
 
     // Mock the Secrets Manager response
     secretsManagerMock.on(GetSecretValueCommand).resolves({
@@ -87,7 +92,7 @@ describe("Lambda handler", () => {
 
     soracomHttpClientMock
       .onPut(
-        /https:\/\/api.soracom.io\/v1\/files\/private\/test\/path\/testDevice-\d{14}.jpg/
+        /https:\/\/api.soracom.io\/v1\/files\/private\/test\/path\/testDirectory\/testDevice-\d{14}.jpg/
       )
       .reply(201);
 
diff --git a/lambda/soracam-image-source.ts b/lambda/soracam-image-source.ts
index 8793f17..5eaa21b 100644
--- a/lambda/soracam-image-source.ts
+++ b/lambda/soracam-image-source.ts
@@ -4,18 +4,23 @@ import { getSoracomClient, setGetSoracomClient } from "./lib/utils";
 export { setGetSoracomClient };
 
 export const handler = async (event: any = {}): Promise<any> => {
-  if (!event.queryStringParameters || !event.queryStringParameters.device_id) {
+  if (
+    !event.queryStringParameters ||
+    !event.queryStringParameters.device_id ||
+    !event.queryStringParameters.upload_directory
+  ) {
     return {
       statusCode: 400,
       body: JSON.stringify({
-        message: "device is required in querystring parameters",
+        message:
+          "device_id and upload_directory are required in querystring parameters",
       }),
     };
   }
 
   const harvestfilesPath = process.env.HARVEST_FILES_PATH!;
-
   const deviceId = event.queryStringParameters.device_id;
+  const uploadDirectory = event.queryStringParameters.upload_directory;
   const soracomClient = await getSoracomClient();
 
   const time = Date.now() - 1000 * 10;
@@ -42,7 +47,7 @@ export const handler = async (event: any = {}): Promise<any> => {
     }
     await new Promise((resolve) => setTimeout(resolve, 1000));
   }
-  let path = `${harvestfilesPath}/${deviceId}-${dayjs().format(
+  let path = `${harvestfilesPath}/${uploadDirectory}/${deviceId}-${dayjs().format(
     "YYYYMMDDHHmmss"
   )}.jpg`;