diff --git a/jupyter_drives/manager.py b/jupyter_drives/manager.py
index 5af78db..705eba4 100644
--- a/jupyter_drives/manager.py
+++ b/jupyter_drives/manager.py
@@ -319,7 +319,7 @@ async def mount_drive(self, drive_name, provider):
         except Exception as e:
             raise tornado.web.HTTPError(
             status_code= httpx.codes.BAD_REQUEST,
-            reason= f"The following error occured when mouting the drive: {e}"
+            reason= f"{e}"
             )
 
         return 
@@ -771,7 +771,7 @@ async def _get_drive_location(self, drive_name):
         except Exception as e:
              raise tornado.web.HTTPError(
             status_code= httpx.codes.BAD_REQUEST,
-            reason=f"The following error occured when retriving the drive location: {e}",
+            reason=f"{e}",
             )
     
         return location
diff --git a/src/plugins/drivelistmanager.tsx b/src/plugins/drivelistmanager.tsx
index fc47290..5cc718a 100644
--- a/src/plugins/drivelistmanager.tsx
+++ b/src/plugins/drivelistmanager.tsx
@@ -9,7 +9,8 @@ import {
   excludeDrive,
   getDrivesList,
   getExcludedDrives,
-  includeDrive
+  includeDrive,
+  mountDrive
 } from '../requests';
 import { ISignal, Signal } from '@lumino/signaling';
 import { driveBrowserIcon, addIcon, removeIcon } from '../icons';
@@ -27,6 +28,8 @@ export interface IDriveInputProps {
   onSubmit: () => void;
   isPublic: boolean;
   setIsPublic: (value: boolean) => void;
+  mountError: string;
+  resetMountError: () => void;
 }
 
 export function DriveInputComponent({
@@ -36,7 +39,9 @@ export function DriveInputComponent({
   setRegion,
   onSubmit,
   isPublic,
-  setIsPublic
+  setIsPublic,
+  mountError,
+  resetMountError
 }: IDriveInputProps) {
   return (
     <div>
@@ -45,6 +50,7 @@ export function DriveInputComponent({
           className="drive-search-input"
           onInput={(event: any) => {
             setPublicDrive(event.target.value);
+            resetMountError();
           }}
           placeholder="Enter drive name"
           value={driveValue}
@@ -69,12 +75,18 @@ export function DriveInputComponent({
             className="drive-region-input"
             onInput={(event: any) => {
               setRegion(event.target.value);
+              resetMountError();
             }}
             placeholder="Region (e.g.: us-east-1)"
             value={regionValue}
           />
         )}
       </div>
+      {mountError && (
+        <div className="add-public-drive-section">
+          <p className="error">{mountError}</p>
+        </div>
+      )}
     </div>
   );
 }
@@ -183,6 +195,7 @@ export function DriveListManagerComponent({ model }: IProps) {
   );
   const [isPublic, setIsPublic] = useState<boolean>(false);
   const [driveRegion, setDriveRegion] = useState<string>('');
+  const [mountError, setMountError] = useState<string>('');
 
   // Called after mounting.
   React.useEffect(() => {
@@ -197,14 +210,24 @@ export function DriveListManagerComponent({ model }: IProps) {
   }, [model]);
 
   const onAddedPublicDrive = async () => {
-    if (isPublic) {
-      await addPublicDrive(publicDrive);
+    // Check if user has access to drive.
+    const result = await mountDrive(publicDrive, {
+      provider: 's3'
+    });
+    if (result && result.error) {
+      // Show error in case of failure.
+      setMountError(result.error.message);
     } else {
-      await addExternalDrive(publicDrive, driveRegion);
+      // Proceed with adding the drive otherwise.
+      if (isPublic) {
+        await addPublicDrive(publicDrive);
+      } else {
+        await addExternalDrive(publicDrive, driveRegion);
+        setDriveRegion('');
+      }
       setDriveRegion('');
+      await model.refresh();
     }
-    setPublicDrive('');
-    await model.refresh();
   };
 
   return (
@@ -239,6 +262,8 @@ export function DriveListManagerComponent({ model }: IProps) {
             isPublic={isPublic}
             setIsPublic={setIsPublic}
             onSubmit={onAddedPublicDrive}
+            mountError={mountError}
+            resetMountError={() => setMountError('')}
           />
         </div>
 
diff --git a/src/requests.ts b/src/requests.ts
index 1ed57d7..8891eb5 100644
--- a/src/requests.ts
+++ b/src/requests.ts
@@ -73,7 +73,15 @@ export async function mountDrive(
     drive_name: driveName,
     provider: options.provider
   };
-  return await requestAPI<any>('drives', 'POST', body);
+  try {
+    await requestAPI<any>('drives', 'POST', body);
+  } catch (error: any) {
+    return {
+      error: error
+    };
+  }
+
+  return;
 }
 
 /**
diff --git a/style/base.css b/style/base.css
index da490ae..204e0f5 100644
--- a/style/base.css
+++ b/style/base.css
@@ -157,3 +157,8 @@ li {
   fill: var(--jp-ui-inverse-font-color0) !important;
   color: var(--jp-ui-inverse-font-color0) !important;
 }
+
+.error {
+  color: var(--md-red-600);
+  font-size: 0.7rem;
+}