diff --git a/README.md b/README.md
index 6367e67..14795c1 100644
--- a/README.md
+++ b/README.md
@@ -4,4 +4,4 @@
 
 Allows to upload files to Amazon S3 bucket from adminforth application.
 
-## For usage, see [AdminForth Upload Documentation](https://adminforth.dev/docs/tutorial/Plugins/upload/)
\ No newline at end of file
+## For usage, see [AdminForth Upload Documentation](https://adminforth.dev/docs/tutorial/Plugins/upload/)
diff --git a/custom/preview.vue b/custom/preview.vue
index 75541a0..4080b14 100644
--- a/custom/preview.vue
+++ b/custom/preview.vue
@@ -58,7 +58,7 @@
   } */
 </style>
 <script setup>
-import { ref, computed , onMounted, watch} from 'vue'
+import { ref, computed , onMounted, watch, nextTick} from 'vue'
 import mediumZoom from 'medium-zoom'
 import { useRoute } from 'vue-router'
 
@@ -71,6 +71,30 @@ const props = defineProps({
   meta: Object,
 })
 
+const trueContentType  = ref(null);
+
+onMounted(async () => {
+   // try to get HEAD request
+   try {
+    const response = await fetch(url.value, {
+      method: 'HEAD',
+    });
+    const ct = response.headers.get('Content-Type');
+    if (ct) {
+      trueContentType.value = ct;
+    }
+  } catch (e) {
+    console.error('fetch error for getting content type, please check CORS allowed for HEAD request', e);
+  }
+});
+
+const contentType = computed(() => {
+  if (trueContentType.value) {
+    return trueContentType.value;
+  }
+  return guessedContentType.value;
+});
+
 const route = useRoute();
 const url = computed(() => {
   return props.record[`previewUrl_${props.meta.pluginInstanceId}`];
@@ -95,11 +119,11 @@ const minWidth = computed(() => {
 });
 // since we have no way to know the content type of the file, we will try to guess it from extension
 // for better experience probably we should check whether user saves content type in the database and use it here
-const contentType = computed(() => {
+const guessedContentType = computed(() => {
   if (!url.value) {
     return null;
   }
-  const u = new URL(url.value);
+  const u = new URL(url.value, url.value.startsWith('http') ? undefined : location.origin);
   return guessContentType(u.pathname);
 });
 
@@ -117,14 +141,18 @@ function guessContentType(url) {
 }
 
 
-onMounted(async () => {
-  
-  if (contentType.value?.startsWith('image')) {
+watch([contentType], async ([contentType]) => {
+  // since content type might change after true guessing (HEAD request might be slow) we need to try initializing zoom again
+  if (zoom.value) {
+    zoom.value.detach();
+  }
+  await nextTick();
+  if (contentType?.startsWith('image')) {
     zoom.value = mediumZoom(img.value, {
       margin: 24,
     });
   }
 
-});
+}, { immediate: true });
 
 </script>
\ No newline at end of file
diff --git a/custom/uploader.vue b/custom/uploader.vue
index e95a6e3..36a0533 100644
--- a/custom/uploader.vue
+++ b/custom/uploader.vue
@@ -273,7 +273,7 @@ const onFileChange = async (e) => {
     });
     if (!success) {
       adminforth.alert({
-        messageHtml: `<div>${t('Sorry but the file was not uploaded because of S3 Request Error:')}</div>
+        messageHtml: `<div>${t('Sorry but the file was not uploaded because of internal storage Request Error:')}</div>
         <pre style="white-space: pre-wrap; word-wrap: break-word; overflow-wrap: break-word; max-width: 100%;">${
           xhr.responseText.replace(/</g, '&lt;').replace(/>/g, '&gt;')
         }</pre>`,
diff --git a/index.ts b/index.ts
index b284627..3fb70f0 100644
--- a/index.ts
+++ b/index.ts
@@ -14,6 +14,8 @@ export default class UploadPlugin extends AdminForthPlugin {
   totalCalls: number;
   totalDuration: number;
 
+  resourceConfig: AdminForthResource;
+
   constructor(options: PluginOptions) {
     super(options, import.meta.url);
     this.options = options;
@@ -28,7 +30,8 @@ export default class UploadPlugin extends AdminForthPlugin {
   }
 
   async setupLifecycleRule() {
-    this.options.storageAdapter.setupLifecycle();
+    const adapterUserUniqueRepresentation = `${this.resourceConfig.resourceId}-${this.pluginInstanceId}`;
+    this.options.storageAdapter.setupLifecycle(adapterUserUniqueRepresentation);
   }
 
   async genPreviewUrl(record: any) {
@@ -43,6 +46,7 @@ export default class UploadPlugin extends AdminForthPlugin {
 
   async modifyResourceConfig(adminforth: IAdminForth, resourceConfig: AdminForthResource) {
     super.modifyResourceConfig(adminforth, resourceConfig);
+    this.resourceConfig = resourceConfig;
     // after column to store the path of the uploaded file, add new VirtualColumn,
     // show only in edit and create views
     // use component uploader.vue
@@ -361,7 +365,7 @@ export default class UploadPlugin extends AdminForthPlugin {
             return { error: `Record with id ${recordId} not found` };
           }
           
-          attachmentFiles = this.options.generation.attachFiles({ record, adminUser });
+          attachmentFiles = await this.options.generation.attachFiles({ record, adminUser });
           // if files is not array, make it array
           if (!Array.isArray(attachmentFiles)) {
             attachmentFiles = [attachmentFiles];
diff --git a/types.ts b/types.ts
index 08ad927..b3efd5c 100644
--- a/types.ts
+++ b/types.ts
@@ -131,7 +131,7 @@ export type PluginOptions = {
     attachFiles?: ({ record, adminUser }: {
       record: any,
       adminUser: AdminUser,
-    }) => string[],
+    }) => string[] | Promise<string[]>,
 
     
     /**