diff --git a/src/containers/cstmrService/inquiry/UserInquiryContainer.js b/src/containers/cstmrService/inquiry/UserInquiryContainer.js
index 70cf43d..07dc482 100644
--- a/src/containers/cstmrService/inquiry/UserInquiryContainer.js
+++ b/src/containers/cstmrService/inquiry/UserInquiryContainer.js
@@ -212,7 +212,11 @@ export default function UserInquiryContainer({ memberName }) {
       return;
     } else if (fileInfos.length > 0) {
       const allowedExtensions = ['jpg', 'png', 'jpeg', 'gif'];
-      const fileExtension = fileInfos[0].name.split('.').pop().toLowerCase();
+      const fileExtension = (fileInfos[0].name || fileInfos[0].fileName)
+        .split('.')
+        .pop()
+        .toLowerCase();
+
       const maxFileSize = 3 * 1024 * 1024; // 3MB
 
       if (!allowedExtensions.includes(fileExtension)) {
@@ -227,7 +231,7 @@ export default function UserInquiryContainer({ memberName }) {
         return;
       }
 
-      if (fileInfos[0].size > maxFileSize) {
+      if (fileInfos[0].size >= maxFileSize) {
         setValidationModal({
           ...validationModal,
           errorType: {