diff --git a/packages/storage/src/providers/s3/apis/list.ts b/packages/storage/src/providers/s3/apis/list.ts
index 2037b237a64..22e060debec 100644
--- a/packages/storage/src/providers/s3/apis/list.ts
+++ b/packages/storage/src/providers/s3/apis/list.ts
@@ -1,7 +1,6 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-import { AmplifyV6 } from '@aws-amplify/core';
 import {
 	ListObjectsV2Input,
 	ListObjectsV2Output,
diff --git a/packages/storage/src/providers/s3/types/index.ts b/packages/storage/src/providers/s3/types/index.ts
index a74968c698f..f0344224469 100644
--- a/packages/storage/src/providers/s3/types/index.ts
+++ b/packages/storage/src/providers/s3/types/index.ts
@@ -1,7 +1,12 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-export { S3TransferOptions, S3GetUrlOptions, S3UploadOptions } from './options';
+export {
+	S3TransferOptions,
+	S3GetUrlOptions,
+	S3UploadOptions,
+	GetKeyWithPrefixOptions,
+} from './options';
 export {
 	S3DownloadDataResult,
 	S3DownloadFileResult,
diff --git a/packages/storage/src/providers/s3/types/options.ts b/packages/storage/src/providers/s3/types/options.ts
index 8a595ecfd28..e08b8e75d1e 100644
--- a/packages/storage/src/providers/s3/types/options.ts
+++ b/packages/storage/src/providers/s3/types/options.ts
@@ -3,6 +3,7 @@
 
 import { TransferProgressEvent } from '../../../types';
 import { StorageOptions } from '../../../types/params';
+import { StorageAccessLevel } from '@aws-amplify/core';
 
 type S3Options = StorageOptions & {
 	/**
@@ -57,3 +58,9 @@ export type S3UploadOptions = S3TransferOptions & {
 	 */
 	metadata?: Record<string, string>;
 };
+
+export type GetKeyWithPrefixOptions = {
+	accessLevel: StorageAccessLevel;
+	targetIdentityId?: string;
+	key: string;
+};
diff --git a/packages/storage/src/providers/s3/utils/getKeyWithPrefix.ts b/packages/storage/src/providers/s3/utils/getKeyWithPrefix.ts
index 4252584dd8d..517be9fd63f 100644
--- a/packages/storage/src/providers/s3/utils/getKeyWithPrefix.ts
+++ b/packages/storage/src/providers/s3/utils/getKeyWithPrefix.ts
@@ -3,12 +3,13 @@
 
 import { AmplifyV6, StorageAccessLevel } from '@aws-amplify/core';
 import { prefixResolver as defaultPrefixResolver } from '../../../utils/prefixResolver';
+import { GetKeyWithPrefixOptions } from '../types';
 
-export function getKeyWithPrefix(
-	accessLevel: StorageAccessLevel,
-	targetIdentityId: string,
-	key: string
-) {
+export function getKeyWithPrefix({
+	accessLevel,
+	targetIdentityId,
+	key,
+}: GetKeyWithPrefixOptions) {
 	const { prefixResolver = defaultPrefixResolver } =
 		AmplifyV6.libraryOptions?.Storage ?? {};
 	return (
diff --git a/packages/storage/src/providers/s3/utils/resolveStorageConfig.ts b/packages/storage/src/providers/s3/utils/resolveStorageConfig.ts
index b4df14d791f..e8e6294a565 100644
--- a/packages/storage/src/providers/s3/utils/resolveStorageConfig.ts
+++ b/packages/storage/src/providers/s3/utils/resolveStorageConfig.ts
@@ -5,11 +5,14 @@ import { AmplifyV6 } from '@aws-amplify/core';
 import { assertValidationError } from '../../../errors/utils/assertValidationError';
 import { StorageValidationErrorCode } from '../../../errors/types/validation';
 
+const DEFAULT_ACCESS_LEVEL = 'guest';
+
 export function resolveStorageConfig() {
 	const { bucket, region } = AmplifyV6.getConfig()?.Storage ?? {};
 	assertValidationError(!!bucket, StorageValidationErrorCode.NoBucket);
 	assertValidationError(!!region, StorageValidationErrorCode.NoRegion);
-	const { defaultAccessLevel } = AmplifyV6.libraryOptions?.Storage ?? {};
+	const { defaultAccessLevel = DEFAULT_ACCESS_LEVEL } =
+		AmplifyV6.libraryOptions?.Storage ?? {};
 	return {
 		defaultAccessLevel,
 		bucket,
diff --git a/packages/storage/src/types/params.ts b/packages/storage/src/types/params.ts
index d133f5eaf62..2fd5eca9766 100644
--- a/packages/storage/src/types/params.ts
+++ b/packages/storage/src/types/params.ts
@@ -6,8 +6,8 @@
 import { Credentials } from '@aws-sdk/types';
 
 export type StorageConfig = {
-	region?: string;
-	credentials?: Credentials;
+	region: string;
+	credentials: Credentials;
 };
 
 export type StorageOptions =