diff --git a/frontend/src/lib/components/ArgInput.svelte b/frontend/src/lib/components/ArgInput.svelte
index 80b0388df1..2f4a9af993 100644
--- a/frontend/src/lib/components/ArgInput.svelte
+++ b/frontend/src/lib/components/ArgInput.svelte
@@ -573,6 +573,30 @@
 								}}
 							/>
 						</div>
+					{:else if itemsType?.type == 'object' && itemsType?.resourceType == 's3object'}
+						<div class="w-full">
+							<FileUpload
+								{appPath}
+								computeForceViewerPolicies={computeS3ForceViewerPolicies}
+								{workspace}
+								allowMultiple={true}
+								randomFileKey={true}
+								on:addition={(evt) => {
+									value = [
+										...value,
+										{
+											s3: evt.detail?.path ?? '',
+											filename: evt.detail?.filename ?? ''
+										}
+									]
+								}}
+								on:deletion={(evt) => {
+									value = value.filter((v) => v.s3 !== evt.detail?.path)
+								}}
+								defaultValue={defaultValue?.map((v) => v.s3)}
+								initialValue={value}
+							/>
+						</div>
 					{:else}
 						<div class="w-full">
 							{#key redraw}
diff --git a/frontend/src/lib/components/ArrayTypeNarrowing.svelte b/frontend/src/lib/components/ArrayTypeNarrowing.svelte
index 89285414de..3694b021b7 100644
--- a/frontend/src/lib/components/ArrayTypeNarrowing.svelte
+++ b/frontend/src/lib/components/ArrayTypeNarrowing.svelte
@@ -21,9 +21,19 @@
 		  }
 		| undefined
 
-	let selected: 'string' | 'number' | 'object' | 'bytes' | 'enum' | 'resource' | undefined =
+	let selected:
+		| 'string'
+		| 'number'
+		| 'object'
+		| 'bytes'
+		| 'enum'
+		| 'resource'
+		| 's3object'
+		| undefined =
 		itemsType?.type != 'string'
-			? itemsType?.type
+			? itemsType?.type == 'object' && itemsType?.resourceType == 's3object'
+				? 's3object'
+				: itemsType?.type
 			: Array.isArray(itemsType?.enum)
 				? 'enum'
 				: itemsType?.contentEncoding == 'base64'
@@ -62,6 +72,8 @@
 					itemsType = { type: 'string', contentEncoding: 'base64' }
 				} else if (selected == 'resource') {
 					itemsType = { type: 'resource', resourceType: itemsType?.resourceType }
+				} else if (selected == 's3object') {
+					itemsType = { type: 'object', resourceType: 's3object' }
 				} else {
 					itemsType = undefined
 				}
@@ -71,6 +83,7 @@
 			<option value="string"> Items are strings</option>
 			<option value="enum">Items are strings from an enum</option>
 			{#if originalType != 'string[]'}
+				<option value="s3object">Items are S3 objects</option>
 				<option value="object"> Items are objects (JSON)</option>
 				<option value="resource"> Items are resources</option>
 				<option value="number">Items are numbers</option>
diff --git a/frontend/src/lib/components/common/fileInput/FileInput.svelte b/frontend/src/lib/components/common/fileInput/FileInput.svelte
index 0212f5f534..77d9b308d8 100644
--- a/frontend/src/lib/components/common/fileInput/FileInput.svelte
+++ b/frontend/src/lib/components/common/fileInput/FileInput.svelte
@@ -18,7 +18,7 @@
 	export let iconSize = 36
 	export let returnFileNames = false
 	export let submittedText: string | undefined = undefined
-	export let defaultFile: string | undefined = undefined
+	export let defaultFile: string | string[] | undefined = undefined
 	export let disabled: boolean | undefined = undefined
 	export let folderOnly = false
 
@@ -160,9 +160,8 @@
 		files = files
 		if (convertTo && files) {
 			const promises = files.map(convertFile)
-			let converted: ConvertedFile[] | { name: string; data: ConvertedFile }[] = await Promise.all(
-				promises
-			)
+			let converted: ConvertedFile[] | { name: string; data: ConvertedFile }[] =
+				await Promise.all(promises)
 			if (returnFileNames) {
 				converted = converted.map((c, i) => ({ name: files![i].name, data: c }))
 			}
@@ -239,7 +238,7 @@
 		{multiple}
 		{...$$restProps}
 	/>
-	{#if defaultFile}
+	{#if defaultFile && (!Array.isArray(defaultFile) || defaultFile.length > 0)}
 		<div class="w-full border-dashed border-t-2 text-2xs pt-1 text-tertiary mt-2">
 			Default file: <span class="text-blue-500">{defaultFile}</span>
 		</div>
diff --git a/frontend/src/lib/components/common/fileUpload/FileUpload.svelte b/frontend/src/lib/components/common/fileUpload/FileUpload.svelte
index 9e5180b76c..44f2a7d8d6 100644
--- a/frontend/src/lib/components/common/fileUpload/FileUpload.svelte
+++ b/frontend/src/lib/components/common/fileUpload/FileUpload.svelte
@@ -12,69 +12,111 @@
 	import { createEventDispatcher, onDestroy } from 'svelte'
 	import { emptyString } from '$lib/utils'
 
-	export let acceptedFileTypes: string[] | undefined = ['*']
-	export let allowMultiple: boolean = true
-	export let allowDelete = true
-	export let folderOnly = false
-	export let containerText: string = folderOnly
-		? 'Drag and drop a folder here or click to browse'
-		: allowMultiple
-			? 'Drag and drop files here or click to browse'
-			: 'Drag and drop a file here or click to browse'
-	export let customResourcePath: string | undefined = undefined
-	export let customResourceType: 's3' | 'azure_blob' | undefined = undefined // when customResourcePath is provided, this should be provided as well. Will default to S3 if not
-	export let customClass: string = ''
-	export let customStyle: string = ''
-	export let randomFileKey: boolean = false
-	export let pathTransformer: any = undefined // function taking as input {file: File} and returning a string
-	export let forceDisplayUploads: boolean = false
-	export let defaultValue: string | undefined = undefined
-	export let workspace: string | undefined = undefined
-	export let fileUploads: Writable<FileUploadData[]> = writable([])
-	export let appPath: string | undefined = undefined
-	export let disabled = false
-	export let iconSize: number | undefined = undefined
-	export let initialValue:
-		| {
-				s3: string
-				filename: string
-		  }
-		| undefined = undefined
-
-	init()
-
-	function init() {
-		if (initialValue?.s3) {
-			if (!$fileUploads.find((fileUpload) => fileUpload.path === initialValue?.s3)) {
-				$fileUploads = [
-					...$fileUploads,
-					{
-						name: initialValue.filename,
-						size: 0,
-						progress: 100,
-						path: initialValue?.s3
-					}
-				]
-			}
-		}
+	interface Props {
+		acceptedFileTypes?: string[] | undefined
+		allowMultiple?: boolean
+		allowDelete?: boolean
+		folderOnly?: boolean
+		containerText?: string
+		customResourcePath?: string | undefined
+		customResourceType?: 's3' | 'azure_blob' | undefined // when customResourcePath is provided, this should be provided as well. Will default to S3 if not
+		customClass?: string
+		customStyle?: string
+		randomFileKey?: boolean
+		pathTransformer?: any // function taking as input {file: File} and returning a string
+		forceDisplayUploads?: boolean
+		defaultValue?: string | string[] | undefined
+		workspace?: string | undefined
+		fileUploads?: Writable<FileUploadData[]>
+		appPath?: string | undefined
+		disabled?: boolean
+		iconSize?: number | undefined
+		initialValue?:
+			| {
+					s3: string
+					filename: string
+			  }
+			| {
+					s3: string
+					filename: string
+			  }[]
+			| undefined
+		computeForceViewerPolicies?:
+			| (() =>
+					| {
+							allowed_resources: string[]
+							allow_user_resources: boolean
+							allow_workspace_resource: boolean
+							file_key_regex: string
+					  }
+					| undefined)
+			| undefined
 	}
 
-	export let computeForceViewerPolicies:
-		| (() =>
-				| {
-						allowed_resources: string[]
-						allow_user_resources: boolean
-						allow_workspace_resource: boolean
-						file_key_regex: string
-				  }
-				| undefined)
-		| undefined = undefined
+	let {
+		acceptedFileTypes = ['*'],
+		allowMultiple = true,
+		allowDelete = true,
+		folderOnly = false,
+		containerText = folderOnly
+			? 'Drag and drop a folder here or click to browse'
+			: allowMultiple
+				? 'Drag and drop files here or click to browse'
+				: 'Drag and drop a file here or click to browse',
+		customResourcePath = undefined,
+		customResourceType = undefined,
+		customClass = '',
+		customStyle = '',
+		randomFileKey = false,
+		pathTransformer = undefined,
+		forceDisplayUploads = $bindable(false),
+		defaultValue = undefined,
+		workspace = undefined,
+		fileUploads = writable([]),
+		appPath = undefined,
+		disabled = false,
+		iconSize = undefined,
+		initialValue = undefined,
+		computeForceViewerPolicies = undefined
+	}: Props = $props()
 
 	const dispatch = createEventDispatcher<{
 		addition: { path?: string; filename?: string }
 		deletion: { path: string }
 	}>()
 
+	let initialS3 = $derived(
+		Array.isArray(initialValue)
+			? initialValue?.map((v) => v.s3)
+			: initialValue?.s3
+				? [initialValue?.s3]
+				: undefined
+	)
+	init()
+
+	function init() {
+		if (initialS3) {
+			function transform(initialValue: { s3: string; filename: string }) {
+				return {
+					name: initialValue.filename,
+					size: 0,
+					progress: 100,
+					path: initialValue?.s3
+				}
+			}
+			for (const s3 of initialS3) {
+				if (!$fileUploads.find((fileUpload) => fileUpload.path === s3)) {
+					let initialFileUploads = initialValue
+						? Array.isArray(initialValue)
+							? initialValue.map(transform)
+							: [transform(initialValue)]
+						: []
+					$fileUploads = [...$fileUploads, ...initialFileUploads]
+				}
+			}
+		}
+	}
+
 	type FileUploadData = {
 		name: string
 		size: number
@@ -554,10 +596,10 @@
 			{containerText}{#if disabled}<br />(Disabled){/if}
 		</FileInput>
 	{/if}
-	{#if initialValue?.s3 && $fileUploads.length == 0}
+	{#if initialS3 && initialS3.length > 0 && $fileUploads.length == 0}
 		<div class="flex flex-row gap-1 items-center p-1">
 			<span class="text-sm">
-				File currently selected: {initialValue?.s3}
+				File currently selected: {initialS3?.join(', ')}
 			</span>
 		</div>
 	{/if}
diff --git a/frontend/src/lib/components/propertyPicker/ObjectViewer.svelte b/frontend/src/lib/components/propertyPicker/ObjectViewer.svelte
index c9f4fec930..97d541a673 100644
--- a/frontend/src/lib/components/propertyPicker/ObjectViewer.svelte
+++ b/frontend/src/lib/components/propertyPicker/ObjectViewer.svelte
@@ -34,7 +34,7 @@
 		level = 0,
 		currentPath = '',
 		pureViewer = false,
-		collapsed = $bindable((level != 0 && level % 3 == 0) || Array.isArray(json)),
+		collapsed = $bindable((level != 0 && level % 3 == 0) || (Array.isArray(json) && level != 0)),
 		rawKey = false,
 		topBrackets = false,
 		allowCopy = true,
@@ -205,6 +205,7 @@
 		{/if}
 	</div>
 {/if}
+
 {#if keys.length > 0}
 	{#if !fullyCollapsed}
 		<span>