diff --git a/backend/src/main/java/aimo/backend/domains/member/controller/MemberController.java b/backend/src/main/java/aimo/backend/domains/member/controller/MemberController.java
index 5028385..e247f49 100644
--- a/backend/src/main/java/aimo/backend/domains/member/controller/MemberController.java
+++ b/backend/src/main/java/aimo/backend/domains/member/controller/MemberController.java
@@ -25,8 +25,8 @@
 import aimo.backend.domains.member.dto.request.UpdateNicknameRequest;
 import aimo.backend.domains.member.dto.request.UpdatePasswordRequest;
 import aimo.backend.infrastructure.s3.S3Service;
-import aimo.backend.infrastructure.s3.dto.CreatePresignedUrlResponse;
-import aimo.backend.infrastructure.s3.dto.SaveFileMetaDataRequest;
+import aimo.backend.infrastructure.s3.dto.response.CreatePresignedUrlResponse;
+import aimo.backend.infrastructure.s3.dto.request.SaveFileMetaDataRequest;
 
 import aimo.backend.domains.member.service.MemberService;
 import jakarta.mail.MessagingException;
diff --git a/backend/src/main/java/aimo/backend/domains/member/service/MemberService.java b/backend/src/main/java/aimo/backend/domains/member/service/MemberService.java
index c076ee2..e92d9f0 100644
--- a/backend/src/main/java/aimo/backend/domains/member/service/MemberService.java
+++ b/backend/src/main/java/aimo/backend/domains/member/service/MemberService.java
@@ -17,11 +17,10 @@
 import aimo.backend.common.mapper.MemberMapper;
 import aimo.backend.domains.member.repository.MemberRepository;
 import aimo.backend.domains.member.repository.ProfileImageRepository;
-import aimo.backend.domains.post.entity.Post;
 import aimo.backend.domains.post.service.PostService;
 import aimo.backend.domains.privatePost.dto.request.CreateResourceUrlRequest;
 import aimo.backend.infrastructure.s3.S3Service;
-import aimo.backend.infrastructure.s3.dto.SaveFileMetaDataRequest;
+import aimo.backend.infrastructure.s3.dto.request.SaveFileMetaDataRequest;
 import aimo.backend.infrastructure.s3.model.PresignedUrlPrefix;
 import aimo.backend.infrastructure.smtp.MailService;
 import aimo.backend.util.memberLoader.MemberLoader;
@@ -33,7 +32,6 @@
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
-import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
 
diff --git a/backend/src/main/java/aimo/backend/domains/post/dto/response/FindPostAndCommentsByIdResponse.java b/backend/src/main/java/aimo/backend/domains/post/dto/response/FindPostAndCommentsByIdResponse.java
index b6a3150..c642ca9 100644
--- a/backend/src/main/java/aimo/backend/domains/post/dto/response/FindPostAndCommentsByIdResponse.java
+++ b/backend/src/main/java/aimo/backend/domains/post/dto/response/FindPostAndCommentsByIdResponse.java
@@ -3,6 +3,8 @@
 import java.time.LocalDateTime;
 import java.util.List;
 
+import com.fasterxml.jackson.annotation.JsonFormat;
+
 import aimo.backend.domains.comment.entity.ParentComment;
 import aimo.backend.domains.member.entity.Member;
 import lombok.AccessLevel;
@@ -37,6 +39,7 @@ public static class ParentCommentDto {
 		private final String content;
 		private final String nickname;
 		private final Integer likesCount;
+		@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
 		private final LocalDateTime createdAt;
 		private final List<ChildCommentDto> childComments;
 
@@ -75,6 +78,7 @@ private static class ChildCommentDto {
 		private final String content;
 		private final String nickname;
 		private final Integer likesCount;
+		@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
 		private final LocalDateTime createdAt;
 	}
 }
diff --git a/backend/src/main/java/aimo/backend/domains/privatePost/controller/PrivatePostController.java b/backend/src/main/java/aimo/backend/domains/privatePost/controller/PrivatePostController.java
index ffff421..16a04c5 100644
--- a/backend/src/main/java/aimo/backend/domains/privatePost/controller/PrivatePostController.java
+++ b/backend/src/main/java/aimo/backend/domains/privatePost/controller/PrivatePostController.java
@@ -34,8 +34,8 @@
 import aimo.backend.domains.privatePost.service.ChatRecordService;
 import aimo.backend.domains.privatePost.service.PrivatePostService;
 
-import aimo.backend.infrastructure.s3.dto.CreatePresignedUrlRequest;
-import aimo.backend.infrastructure.s3.dto.CreatePresignedUrlResponse;
+import aimo.backend.infrastructure.s3.dto.request.CreatePresignedUrlRequest;
+import aimo.backend.infrastructure.s3.dto.response.CreatePresignedUrlResponse;
 import jakarta.validation.Valid;
 
 import aimo.backend.domains.privatePost.service.TextRecordService;
diff --git a/backend/src/main/java/aimo/backend/domains/privatePost/service/AudioRecordService.java b/backend/src/main/java/aimo/backend/domains/privatePost/service/AudioRecordService.java
index e0fcd3d..da354e0 100644
--- a/backend/src/main/java/aimo/backend/domains/privatePost/service/AudioRecordService.java
+++ b/backend/src/main/java/aimo/backend/domains/privatePost/service/AudioRecordService.java
@@ -17,8 +17,8 @@
 import aimo.backend.domains.privatePost.entity.AudioRecord;
 import aimo.backend.domains.privatePost.repository.AudioRecordRepository;
 import aimo.backend.infrastructure.s3.S3Service;
-import aimo.backend.infrastructure.s3.dto.CreatePresignedUrlRequest;
-import aimo.backend.infrastructure.s3.dto.CreatePresignedUrlResponse;
+import aimo.backend.infrastructure.s3.dto.request.CreatePresignedUrlRequest;
+import aimo.backend.infrastructure.s3.dto.response.CreatePresignedUrlResponse;
 import lombok.RequiredArgsConstructor;
 
 @Service
diff --git a/backend/src/main/java/aimo/backend/infrastructure/s3/S3Service.java b/backend/src/main/java/aimo/backend/infrastructure/s3/S3Service.java
index 857935b..4d07f86 100644
--- a/backend/src/main/java/aimo/backend/infrastructure/s3/S3Service.java
+++ b/backend/src/main/java/aimo/backend/infrastructure/s3/S3Service.java
@@ -15,8 +15,8 @@
 import aimo.backend.common.properties.S3Properties;
 import aimo.backend.domains.member.dto.request.CreateProfileImageUrlRequest;
 import aimo.backend.domains.privatePost.dto.request.CreateResourceUrlRequest;
-import aimo.backend.infrastructure.s3.dto.CreatePresignedUrlRequest;
-import aimo.backend.infrastructure.s3.dto.CreatePresignedUrlResponse;
+import aimo.backend.infrastructure.s3.dto.request.CreatePresignedUrlRequest;
+import aimo.backend.infrastructure.s3.dto.response.CreatePresignedUrlResponse;
 import aimo.backend.infrastructure.s3.model.PresignedUrlPrefix;
 import lombok.RequiredArgsConstructor;
 
diff --git a/backend/src/main/java/aimo/backend/infrastructure/s3/dto/CreatePresignedUrlRequest.java b/backend/src/main/java/aimo/backend/infrastructure/s3/dto/CreatePresignedUrlRequest.java
deleted file mode 100644
index d90337d..0000000
--- a/backend/src/main/java/aimo/backend/infrastructure/s3/dto/CreatePresignedUrlRequest.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package aimo.backend.infrastructure.s3.dto;
-
-import aimo.backend.util.validator.ValidFileExtension;
-
-public record CreatePresignedUrlRequest(
-	String filename
-) {
-}
diff --git a/backend/src/main/java/aimo/backend/infrastructure/s3/dto/request/CreatePresignedUrlRequest.java b/backend/src/main/java/aimo/backend/infrastructure/s3/dto/request/CreatePresignedUrlRequest.java
new file mode 100644
index 0000000..462231d
--- /dev/null
+++ b/backend/src/main/java/aimo/backend/infrastructure/s3/dto/request/CreatePresignedUrlRequest.java
@@ -0,0 +1,6 @@
+package aimo.backend.infrastructure.s3.dto.request;
+
+public record CreatePresignedUrlRequest(
+	String filename
+) {
+}
diff --git a/backend/src/main/java/aimo/backend/infrastructure/s3/dto/SaveFileMetaDataRequest.java b/backend/src/main/java/aimo/backend/infrastructure/s3/dto/request/SaveFileMetaDataRequest.java
similarity index 85%
rename from backend/src/main/java/aimo/backend/infrastructure/s3/dto/SaveFileMetaDataRequest.java
rename to backend/src/main/java/aimo/backend/infrastructure/s3/dto/request/SaveFileMetaDataRequest.java
index 268c79a..7c3e6e9 100644
--- a/backend/src/main/java/aimo/backend/infrastructure/s3/dto/SaveFileMetaDataRequest.java
+++ b/backend/src/main/java/aimo/backend/infrastructure/s3/dto/request/SaveFileMetaDataRequest.java
@@ -1,4 +1,4 @@
-package aimo.backend.infrastructure.s3.dto;
+package aimo.backend.infrastructure.s3.dto.request;
 
 import jakarta.validation.constraints.NotNull;
 
diff --git a/backend/src/main/java/aimo/backend/infrastructure/s3/dto/CreatePresignedUrlResponse.java b/backend/src/main/java/aimo/backend/infrastructure/s3/dto/response/CreatePresignedUrlResponse.java
similarity index 62%
rename from backend/src/main/java/aimo/backend/infrastructure/s3/dto/CreatePresignedUrlResponse.java
rename to backend/src/main/java/aimo/backend/infrastructure/s3/dto/response/CreatePresignedUrlResponse.java
index 9f5a5b4..0546274 100644
--- a/backend/src/main/java/aimo/backend/infrastructure/s3/dto/CreatePresignedUrlResponse.java
+++ b/backend/src/main/java/aimo/backend/infrastructure/s3/dto/response/CreatePresignedUrlResponse.java
@@ -1,4 +1,4 @@
-package aimo.backend.infrastructure.s3.dto;
+package aimo.backend.infrastructure.s3.dto.response;
 
 public record CreatePresignedUrlResponse(
 	String presignedUrl,