diff --git a/apps/desktop/src/index.html b/apps/desktop/src/index.html
index 9e256ff06..c0f509c3f 100644
--- a/apps/desktop/src/index.html
+++ b/apps/desktop/src/index.html
@@ -1,16 +1,14 @@
 <!doctype html>
 <html lang="en" class="vanilla-theme">
+	<head>
+		<meta charset="UTF-8" />
+		<link rel="icon" type="image/svg+xml" href="/src/favicon.svg" />
+		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+		<title>Spacedrive</title>
+	</head>
 
-<head>
-    <meta charset="UTF-8" />
-    <link rel="icon" type="image/svg+xml" href="/src/favicon.svg" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>Spacedrive</title>
-</head>
-
-<body style="overflow: hidden">
-    <div id="root"></div>
-    <script type="module" src="./index.tsx"></script>
-</body>
-
+	<body style="overflow: hidden">
+		<div id="root"></div>
+		<script type="module" src="./index.tsx"></script>
+	</body>
 </html>
diff --git a/core/src/custom_uri/mod.rs b/core/src/custom_uri/mod.rs
index 55c34c753..605ec9a36 100644
--- a/core/src/custom_uri/mod.rs
+++ b/core/src/custom_uri/mod.rs
@@ -475,8 +475,8 @@ async fn infer_the_mime_type(
 			"txt" => "text/plain",
 			_ => {
 				if charset.is_empty() {
-					todo!("file ext='{ext}' mime_type='{mime_type}' is not supported");
 					// "TODO: This filetype is not supported because of the missing mime type!",
+					return Err(not_implemented(()));
 				};
 				mime_type
 			}
diff --git a/core/src/custom_uri/utils.rs b/core/src/custom_uri/utils.rs
index 6b5401c11..0b73719d5 100644
--- a/core/src/custom_uri/utils.rs
+++ b/core/src/custom_uri/utils.rs
@@ -31,7 +31,7 @@ pub(crate) fn not_found(err: impl Debug) -> http::Response<BoxBody> {
 #[track_caller]
 pub(crate) fn internal_server_error(err: impl Debug) -> http::Response<BoxBody> {
 	debug!(
-		"500 - Internal Server Error at {}: {err:?}",
+		"500: Internal Server Error at {}: {err:?}",
 		Location::caller()
 	);
 
@@ -40,6 +40,15 @@ pub(crate) fn internal_server_error(err: impl Debug) -> http::Response<BoxBody>
 		.body(body::boxed(Full::from("")))
 }
 
+#[track_caller]
+pub(crate) fn not_implemented(err: impl Debug) -> http::Response<BoxBody> {
+	debug!("501: Not Implemented at {}: {err:?}", Location::caller());
+
+	InfallibleResponse::builder()
+		.status(StatusCode::NOT_IMPLEMENTED)
+		.body(body::boxed(Full::from("")))
+}
+
 pub(crate) async fn cors_middleware<B>(req: Request<B>, next: Next<B>) -> Response<BoxBody> {
 	if req.method() == Method::OPTIONS {
 		return Response::builder()
diff --git a/interface/app/$libraryId/Explorer/FilePath/Thumb.tsx b/interface/app/$libraryId/Explorer/FilePath/Thumb.tsx
index 7384f4b1a..9a2f561e0 100644
--- a/interface/app/$libraryId/Explorer/FilePath/Thumb.tsx
+++ b/interface/app/$libraryId/Explorer/FilePath/Thumb.tsx
@@ -2,6 +2,7 @@ import { getIcon, getIconByName, iconNames } from '@sd/assets/util';
 import clsx from 'clsx';
 import {
 	memo,
+	SyntheticEvent,
 	useCallback,
 	useEffect,
 	useLayoutEffect,
@@ -37,6 +38,8 @@ export interface ThumbProps {
 	size?: number;
 	cover?: boolean;
 	frame?: boolean;
+	onLoad?: (state: ThumbType) => void;
+	onError?: (state: ThumbType, error: Error) => void;
 	blackBars?: boolean;
 	blackBarsSize?: number;
 	extension?: boolean;
@@ -69,16 +72,31 @@ export const FileThumb = memo((props: ThumbProps) => {
 		isDark ? classes.checkers : classes.checkersLight
 	);
 
-	const onLoad = useCallback(() => setLoaded(true), []);
+	const _onLoad = props.onLoad;
+	const onLoad = useCallback(() => {
+		setLoaded(true);
+		_onLoad?.(thumbType);
+	}, [_onLoad, thumbType]);
 
-	const onError = useCallback(() => {
-		setLoaded(false);
-		setThumbType((prevThumbType) =>
-			prevThumbType === ThumbType.Original && itemData.hasLocalThumbnail
-				? ThumbType.Thumbnail
-				: ThumbType.Icon
-		);
-	}, [itemData.hasLocalThumbnail]);
+	const _onError = props.onError;
+	const onError = useCallback(
+		(event: ErrorEvent | SyntheticEvent<Element, Event>) => {
+			setLoaded(false);
+			setThumbType((prevThumbType) =>
+				prevThumbType === ThumbType.Original && itemData.hasLocalThumbnail
+					? ThumbType.Thumbnail
+					: ThumbType.Icon
+			);
+
+			const rawError =
+				('error' in event && event.error) ||
+				('message' in event && event.message) ||
+				'Filetype is not supported yet';
+
+			_onError?.(thumbType, rawError instanceof Error ? rawError : new Error(rawError));
+		},
+		[_onError, thumbType, itemData.hasLocalThumbnail]
+	);
 
 	// useLayoutEffect is required to ensure the thumbType is always updated before the onError listener can execute,
 	// thus avoiding improper thumb types changes
@@ -251,6 +269,11 @@ export const FileThumb = memo((props: ThumbProps) => {
 										)}
 									</>
 								);
+							default:
+								setThumbType(ThumbType.Thumbnail);
+								return null;
+							case 'Image':
+							// Fallthrough as image and thumbnail use the same component
 						}
 					}
 
diff --git a/interface/app/$libraryId/Explorer/OptionsPanel.tsx b/interface/app/$libraryId/Explorer/OptionsPanel.tsx
index dc3035dfd..06e37ec16 100644
--- a/interface/app/$libraryId/Explorer/OptionsPanel.tsx
+++ b/interface/app/$libraryId/Explorer/OptionsPanel.tsx
@@ -177,13 +177,13 @@ export default () => {
 					<Select
 						className="w-full"
 						value={
-							explorer.settingsStore.mediaViewWithDescendants ?
-							'withDescendants'
-							: 'withoutDescendants'
+							explorer.settingsStore.mediaViewWithDescendants
+								? 'withDescendants'
+								: 'withoutDescendants'
 						}
 						onChange={(value) => {
-
-							explorer.settingsStore.mediaViewWithDescendants = value === 'withDescendants';
+							explorer.settingsStore.mediaViewWithDescendants =
+								value === 'withDescendants';
 						}}
 					>
 						{mediaViewContextActions.options.map((option) => (
diff --git a/interface/app/$libraryId/Explorer/QuickPreview/index.tsx b/interface/app/$libraryId/Explorer/QuickPreview/index.tsx
index 9d966ba58..b93fba969 100644
--- a/interface/app/$libraryId/Explorer/QuickPreview/index.tsx
+++ b/interface/app/$libraryId/Explorer/QuickPreview/index.tsx
@@ -4,6 +4,7 @@ import clsx from 'clsx';
 import {
 	ButtonHTMLAttributes,
 	createContext,
+	createRef,
 	useCallback,
 	useContext,
 	useEffect,
@@ -20,7 +21,16 @@ import {
 	useRspcLibraryContext,
 	useZodForm
 } from '@sd/client';
-import { dialogManager, DropdownMenu, Form, ModifierKeys, toast, Tooltip, z } from '@sd/ui';
+import {
+	dialogManager,
+	DropdownMenu,
+	Form,
+	ModifierKeys,
+	toast,
+	ToastMessage,
+	Tooltip,
+	z
+} from '@sd/ui';
 import { useIsDark, useKeybind, useOperatingSystem } from '~/hooks';
 import { usePlatform } from '~/util/Platform';
 
@@ -61,6 +71,8 @@ export const QuickPreview = () => {
 	const explorer = useExplorerContext();
 	const { open, itemIndex } = useQuickPreviewStore();
 
+	const thumb = createRef<HTMLDivElement>();
+	const [thumbErrorToast, setThumbErrorToast] = useState<ToastMessage>();
 	const [showMetadata, setShowMetadata] = useState<boolean>(false);
 	const [isContextMenuOpen, setIsContextMenuOpen] = useState<boolean>(false);
 	const [isRenaming, setIsRenaming] = useState<boolean>(false);
@@ -82,9 +94,33 @@ export const QuickPreview = () => {
 		if (items[index]) getQuickPreviewStore().itemIndex = index;
 	};
 
+	// Error toast
+	useEffect(() => {
+		if (!thumbErrorToast) return;
+
+		let id: string | number | undefined;
+		toast.error(
+			(_id) => {
+				id = _id;
+				return thumbErrorToast;
+			},
+			{
+				ref: thumb,
+				duration: Infinity,
+				onClose() {
+					id = undefined;
+					setThumbErrorToast(undefined);
+				}
+			}
+		);
+
+		return () => void toast.dismiss(id);
+	}, [thumb, thumbErrorToast]);
+
 	// Reset state
 	useEffect(() => {
 		setNewName(null);
+		setThumbErrorToast(undefined);
 
 		if (open || item) return;
 
@@ -202,6 +238,14 @@ export const QuickPreview = () => {
 						onOpenAutoFocus={(e) => e.preventDefault()}
 						onEscapeKeyDown={(e) => isRenaming && e.preventDefault()}
 						onContextMenu={(e) => e.preventDefault()}
+						onInteractOutside={(e) => {
+							if (
+								e.target &&
+								e.target instanceof Node &&
+								thumb.current?.contains(e.target)
+							)
+								e.preventDefault();
+						}}
 					>
 						<div
 							className={clsx(
@@ -220,7 +264,6 @@ export const QuickPreview = () => {
 										<div className="absolute inset-0 bg-black/25 backdrop-blur-3xl" />
 									</div>
 								)}
-
 								<div
 									className={clsx(
 										'z-50 flex items-center p-2',
@@ -396,6 +439,16 @@ export const QuickPreview = () => {
 
 								<FileThumb
 									data={item}
+									onLoad={(type) =>
+										type === 'ORIGINAL' && setThumbErrorToast(undefined)
+									}
+									onError={(type, error) =>
+										type === 'ORIGINAL' &&
+										setThumbErrorToast({
+											title: 'Error loading original file',
+											body: error.message
+										})
+									}
 									loadOriginal
 									mediaControls
 									className={clsx(
diff --git a/interface/app/$libraryId/Explorer/View/GridView.tsx b/interface/app/$libraryId/Explorer/View/GridView.tsx
index 77bfb0c3c..9c292d8a4 100644
--- a/interface/app/$libraryId/Explorer/View/GridView.tsx
+++ b/interface/app/$libraryId/Explorer/View/GridView.tsx
@@ -40,7 +40,7 @@ const GridViewItem = memo(({ data, selected, cut, isRenaming }: GridViewItemProp
 	};
 
 	return (
-		<ViewItem data={data} className="w-full h-full">
+		<ViewItem data={data} className="h-full w-full">
 			<div
 				className={clsx('mb-1 aspect-square rounded-lg', selected && 'bg-app-selectedItem')}
 			>
diff --git a/interface/app/$libraryId/Explorer/useExplorer.ts b/interface/app/$libraryId/Explorer/useExplorer.ts
index 90528251b..66ef551f9 100644
--- a/interface/app/$libraryId/Explorer/useExplorer.ts
+++ b/interface/app/$libraryId/Explorer/useExplorer.ts
@@ -102,7 +102,7 @@ export function useExplorerSettings<TOrder extends Ordering>({
 
 	useEffect(() => {
 		setStore(proxy(settings));
-	}, [location])
+	}, [location]);
 
 	useEffect(
 		() =>
diff --git a/interface/app/$libraryId/Layout/Sidebar/FeedbackDialog.tsx b/interface/app/$libraryId/Layout/Sidebar/FeedbackDialog.tsx
index 4253a9184..5da611dca 100644
--- a/interface/app/$libraryId/Layout/Sidebar/FeedbackDialog.tsx
+++ b/interface/app/$libraryId/Layout/Sidebar/FeedbackDialog.tsx
@@ -46,7 +46,7 @@ export default function FeedbackDialog(props: UseDialogProps) {
 			ctaLabel="Submit"
 			closeLabel="Cancel"
 			buttonsSideContent={
-				<div className="flex items-center justify-center w-full gap-1">
+				<div className="flex w-full items-center justify-center gap-1">
 					{EMOJIS.map((emoji, i) => (
 						<div
 							onClick={() => emojiSelectHandler(i)}
diff --git a/interface/app/$libraryId/settings/library/locations/AddLocationDialog.tsx b/interface/app/$libraryId/settings/library/locations/AddLocationDialog.tsx
index 060241a7a..aaa16bf2e 100644
--- a/interface/app/$libraryId/settings/library/locations/AddLocationDialog.tsx
+++ b/interface/app/$libraryId/settings/library/locations/AddLocationDialog.tsx
@@ -206,7 +206,7 @@ export const AddLocationDialog = ({
 					: ''
 			}
 		>
-			<ErrorMessage name={REMOTE_ERROR_FORM_FIELD} variant="large" className="mt-2 mb-4" />
+			<ErrorMessage name={REMOTE_ERROR_FORM_FIELD} variant="large" className="mb-4 mt-2" />
 
 			<LocationPathInputField {...form.register('path')} />
 
diff --git a/packages/client/src/utils/explorerItem.ts b/packages/client/src/utils/explorerItem.ts
index 1ada12b31..e7f0baabe 100644
--- a/packages/client/src/utils/explorerItem.ts
+++ b/packages/client/src/utils/explorerItem.ts
@@ -63,7 +63,7 @@ export function getExplorerItemData(data?: null | ExplorerItem) {
 		itemData.fullName = `${filePath.name}${filePath.extension ? `.${filePath.extension}` : ''}`;
 		itemData.size = byteSize(filePath.size_in_bytes_bytes);
 		itemData.isDir = filePath.is_dir ?? false;
-		itemData.extension = filePath.extension;
+		itemData.extension = filePath.extension?.toLocaleLowerCase() ?? null;
 		if ('kind' in filePath) itemData.kind = ObjectKind[filePath.kind] ?? 'Unknown';
 		if ('cas_id' in filePath) itemData.casId = filePath.cas_id;
 		if ('location_id' in filePath) itemData.locationId = filePath.location_id;
diff --git a/packages/ui/src/Toast.tsx b/packages/ui/src/Toast.tsx
index e9f91e50a..90d5e486f 100644
--- a/packages/ui/src/Toast.tsx
+++ b/packages/ui/src/Toast.tsx
@@ -1,6 +1,6 @@
 import { CheckCircle, Icon, Info, Warning, WarningCircle, X } from '@phosphor-icons/react';
 import clsx from 'clsx';
-import { CSSProperties, ReactNode, useEffect, useState } from 'react';
+import { CSSProperties, ForwardedRef, forwardRef, ReactNode, useEffect, useState } from 'react';
 import { toast as SonnerToast } from 'sonner';
 
 import { Button } from './Button';
@@ -20,7 +20,7 @@ const toastClassName = clsx(
 
 export type ToastId<T = string | number> = T;
 type ToastType = 'info' | 'success' | 'error' | 'warning';
-type ToastMessage = ReactNode | { title: ReactNode; body?: ReactNode };
+export type ToastMessage = ReactNode | { title: ReactNode; body?: ReactNode };
 type ToastPromiseData = unknown;
 type ToastPromise<T = ToastPromiseData> = Promise<T> | (() => Promise<T>);
 type ToastAction = { label: string; onClick: () => void; className?: string };
@@ -28,6 +28,7 @@ type ToastCloseEvent = 'on-dismiss' | 'on-auto-close' | 'on-action' | 'on-cancel
 
 interface ToastOptions {
 	id?: ToastId;
+	ref?: React.Ref<HTMLDivElement>;
 	type?: ToastType;
 	icon?: ReactNode;
 	duration?: number;
@@ -42,7 +43,7 @@ interface ToastOptions {
 }
 
 interface PromiseToastOptions<T = ToastPromiseData>
-	extends Omit<ToastOptions, 'icon' | 'type' | 'action' | 'cancel' | 'onClose'> {
+	extends Omit<ToastOptions, 'ref' | 'icon' | 'type' | 'action' | 'cancel' | 'onClose'> {
 	loading: ToastMessage;
 	success: ToastMessage | ((data: T) => ToastMessage);
 	error: ToastMessage | ((error: unknown) => ToastMessage);
@@ -73,107 +74,111 @@ const icons: Record<ToastType, Icon> = {
 	warning: Warning
 };
 
-const Toast = ({ closable = true, action, cancel, ...props }: ToastProps) => {
-	const message = typeof props.message === 'function' ? props.message(props.id) : props.message;
+const Toast = forwardRef<HTMLDivElement, ToastProps>(
+	({ closable = true, action, cancel, ...props }, ref) => {
+		const message =
+			typeof props.message === 'function' ? props.message(props.id) : props.message;
 
-	const title =
-		message && typeof message === 'object' && 'title' in message ? message.title : message;
+		const title =
+			message && typeof message === 'object' && 'title' in message ? message.title : message;
 
-	const body =
-		message && typeof message === 'object' && 'body' in message ? message.body : undefined;
+		const body =
+			message && typeof message === 'object' && 'body' in message ? message.body : undefined;
+
+		const typeIcon = (type: ToastType) => {
+			const Icon = icons[type];
+			return (
+				<Icon
+					size={16}
+					weight="fill"
+					className={clsx(
+						type === 'success' && 'text-green-500',
+						type === 'error' && 'text-red-500',
+						type === 'warning' && 'text-yellow-500'
+					)}
+				/>
+			);
+		};
 
-	const typeIcon = (type: ToastType) => {
-		const Icon = icons[type];
 		return (
-			<Icon
-				size={16}
-				weight="fill"
+			<div
+				ref={ref}
 				className={clsx(
-					type === 'success' && 'text-green-500',
-					type === 'error' && 'text-red-500',
-					type === 'warning' && 'text-yellow-500'
+					'pointer-events-auto flex gap-2',
+					body || action || cancel ? 'items-start' : 'items-center'
+				)}
+			>
+				{(props.icon || props.type) && (
+					<div className={clsx((body || action || cancel) && 'mt-px')}>
+						{props.icon || (props.type && typeIcon(props.type))}
+					</div>
 				)}
-			/>
-		);
-	};
 
-	return (
-		<div
-			className={clsx(
-				'flex gap-2',
-				body || action || cancel ? 'items-start' : 'items-center'
-			)}
-		>
-			{(props.icon || props.type) && (
-				<div className={clsx((body || action || cancel) && 'mt-px')}>
-					{props.icon || (props.type && typeIcon(props.type))}
+				<div className="flex grow flex-col">
+					{title && (
+						<span className="font-medium text-ink" style={{ wordBreak: 'break-word' }}>
+							{title}
+						</span>
+					)}
+
+					{body && (
+						<div className="mt-0.5" style={{ wordBreak: 'break-word' }}>
+							{body}
+						</div>
+					)}
+
+					{(action || cancel) && (
+						<div className="mt-2.5 flex gap-2">
+							{action && (
+								<Button
+									variant="accent"
+									onClick={() => {
+										action.onClick();
+										props.onClose?.({ id: props.id, event: 'on-action' });
+										toast.dismiss(props.id);
+									}}
+									className={clsx(actionButtonClassName, action.className)}
+								>
+									{action.label}
+								</Button>
+							)}
+
+							{cancel && (
+								<Button
+									variant="gray"
+									onClick={() => {
+										typeof cancel === 'object' && cancel.onClick?.();
+										props.onClose?.({ id: props.id, event: 'on-cancel' });
+										toast.dismiss(props.id);
+									}}
+									className={clsx(
+										actionButtonClassName,
+										typeof cancel === 'object' ? cancel.className : null
+									)}
+								>
+									{typeof cancel === 'object' ? cancel.label : cancel}
+								</Button>
+							)}
+						</div>
+					)}
 				</div>
-			)}
 
-			<div className="flex grow flex-col">
-				{title && (
-					<span className="font-medium text-ink" style={{ wordBreak: 'break-word' }}>
-						{title}
-					</span>
-				)}
-
-				{body && (
-					<div className="mt-0.5" style={{ wordBreak: 'break-word' }}>
-						{body}
-					</div>
-				)}
-
-				{(action || cancel) && (
-					<div className="mt-2.5 flex gap-2">
-						{action && (
-							<Button
-								variant="accent"
-								onClick={() => {
-									action.onClick();
-									props.onClose?.({ id: props.id, event: 'on-action' });
-									toast.dismiss(props.id);
-								}}
-								className={clsx(actionButtonClassName, action.className)}
-							>
-								{action.label}
-							</Button>
-						)}
-
-						{cancel && (
-							<Button
-								variant="gray"
-								onClick={() => {
-									typeof cancel === 'object' && cancel.onClick?.();
-									props.onClose?.({ id: props.id, event: 'on-cancel' });
-									toast.dismiss(props.id);
-								}}
-								className={clsx(
-									actionButtonClassName,
-									typeof cancel === 'object' ? cancel.className : null
-								)}
-							>
-								{typeof cancel === 'object' ? cancel.label : cancel}
-							</Button>
-						)}
-					</div>
+				{closable && (
+					<button
+						className="relative transition-colors before:absolute before:-inset-2 before:content-[''] hover:text-ink"
+						onClick={() => {
+							props.onDismiss?.(props.id);
+							props.onClose?.({ id: props.id, event: 'on-dismiss' });
+							toast.dismiss(props.id);
+						}}
+					>
+						<X weight="bold" />
+					</button>
 				)}
 			</div>
-
-			{closable && (
-				<button
-					className="relative transition-colors before:absolute before:-inset-2 before:content-[''] hover:text-ink"
-					onClick={() => {
-						props.onDismiss?.(props.id);
-						props.onClose?.({ id: props.id, event: 'on-dismiss' });
-						toast.dismiss(props.id);
-					}}
-				>
-					<X weight="bold" />
-				</button>
-			)}
-		</div>
-	);
-};
+		);
+	}
+);
 
 interface PromiseToastProps<T = ToastPromiseData>
 	extends Pick<
@@ -244,6 +249,7 @@ const PromiseToast = <T extends ToastPromiseData>({
 const renderToast = (
 	message: ToastMessage | ((id: ToastId) => ToastMessage),
 	{
+		ref,
 		type,
 		icon,
 		action,
@@ -259,6 +265,7 @@ const renderToast = (
 		(id) => (
 			<Toast
 				id={id}
+				ref={ref}
 				type={type}
 				icon={icon}
 				message={message}