diff --git a/repository/TiddlyWiki/Tiddler.class.st b/repository/TiddlyWiki/Tiddler.class.st
index 902297a..33e2be4 100644
--- a/repository/TiddlyWiki/Tiddler.class.st
+++ b/repository/TiddlyWiki/Tiddler.class.st
@@ -180,7 +180,7 @@ Tiddler >> customFieldsWithMediaLinks [
 	| response |
 	response := OrderedDictionary new.
 	self customFields keysAndValuesDo: [:k :v | 
-		(v endsWithAnyOf: #('mp4' 'jpg' 'jpeg' 'png'))
+		(v endsWithAnyOf: #('mp4' 'wav' 'jpg' 'jpeg' 'png'))
 			ifTrue: [response at: k put: v ]
 	].
 	^ response
@@ -192,8 +192,57 @@ Tiddler >> deleteUid [
 ]
 
 { #category : #accessing }
-Tiddler >> downloadAndIndexMediaLinksInto: aFolder [
-	^ self customFieldsWithMediaLinks
+Tiddler >> downloadAndRelinkExternalMedia [
+	| mediaExtensions|
+	mediaExtensions := Dictionary new
+		at: 'audio' put: #('wav');
+		at: 'video' put: #('mp4');
+		at: 'image' put: #('jpg' 'jpeg' 'png');
+		yourself.
+	self customFieldsWithMediaLinks
+		keysAndValuesDo: [ :k :v |
+			mediaExtensions keysAndValuesDo: [:kind :extensions | 
+				(v asLowercase endsWithAnyOf: extensions)
+					ifTrue: [ | localFile|
+						self downloadLink: v for: k into: 'external/', kind , '/'.
+						localFile := (self wiki substitutions at: self title at: k) second.
+						self customFields at: k put: localFile.
+					]
+			]
+		].
+	^ self wiki substitutions
+]
+
+{ #category : #accessing }
+Tiddler >> downloadLink: v for: k [
+	| filePath fileName semiFilePath |
+	fileName := v asUrl segments last.
+	semiFilePath := 'external/video/' , fileName.
+	filePath := (self wiki folder / semiFilePath) fullName.
+	GtSubprocessWithInMemoryOutput new
+		shellCommand: 'curl -L -# ' , v , ' -o ' , filePath;
+		runAndWait;
+		stdout.
+	^ Dictionary new
+		at: k
+			put: {v.
+					semiFilePath};
+		yourself
+]
+
+{ #category : #accessing }
+Tiddler >> downloadLink: v for: k into: subfolder [
+	| filePath fileName semiFilePath |
+	fileName := v asUrl segments last.
+	semiFilePath := subfolder , fileName.
+	filePath := (self wiki folder / semiFilePath) fullName.
+	GtSubprocessWithInMemoryOutput new
+		shellCommand: 'curl -L -# ' , v , ' -o ' , filePath;
+		runAndWait;
+		stdout.
+	^ self wiki substitutions 
+		at: self title at: k put: {v. semiFilePath};
+		yourself
 ]
 
 { #category : #accessing }
diff --git a/repository/TiddlyWiki/TiddlyWiki.class.st b/repository/TiddlyWiki/TiddlyWiki.class.st
index 3cc7ceb..93be0b1 100644
--- a/repository/TiddlyWiki/TiddlyWiki.class.st
+++ b/repository/TiddlyWiki/TiddlyWiki.class.st
@@ -256,12 +256,32 @@ TiddlyWiki >> exportContentType: aMimeType [
 { #category : #accessing }
 TiddlyWiki >> exportJSONFile [
 	| docTree rawJsonTiddlers |
+	self tiddlers isNotEmpty ifTrue: [^ self exportJSONFileFromTiddlers ].
 	self htmlFileExists.
 	docTree := XMLHTMLParser parse: self file contents.
 	rawJsonTiddlers := (docTree xpath: '//script[@class="tiddlywiki-tiddler-store"]') stringValue.
 	^ MarkupFile exportAsFileOn: self jsonFile containing: rawJsonTiddlers
 ]
 
+{ #category : #accessing }
+TiddlyWiki >> exportJSONFileFromTiddlers [
+	| response |
+	response := '' writeStream.
+	response
+		nextPutAll: '['; cr.
+	self tiddlers allButLastDo: [:tiddler |
+		response 
+			nextPutAll: tiddler asJsonString;
+			nextPutAll: ','; cr 
+	].
+	response 
+		nextPutAll: self tiddlers last asJsonString; cr;
+		nextPutAll: ']'; cr.
+	^ MarkupFile 
+		exportAsFileOn: self folder / 'tiddlers.json' 
+		containing: response contents
+]
+
 { #category : #accessing }
 TiddlyWiki >> exportJSONFileOptimized [
 
@@ -496,8 +516,8 @@ TiddlyWiki >> importJSONLink [
 { #category : #accessing }
 TiddlyWiki >> importSTONFilesFrom: aFolder [
 	| tiddlerFiles |
-	self folder: aFolder parent.
-	tiddlerFiles := aFolder children 
+	self folder: aFolder.
+	tiddlerFiles := (aFolder / 'tiddlers') children 
 		select: [ :localFile | localFile basename endsWith: '.ston' ].
 	self tiddlers: (tiddlerFiles collect: [ :each | | tempTiddler| 
 		tempTiddler := STON fromString: each contents.
@@ -892,6 +912,11 @@ TiddlyWiki >> shadow [
  	^ self tiddlers select: [:tiddler | tiddler title beginsWith: '$:/']
 ]
 
+{ #category : #'as yet unclassified' }
+TiddlyWiki >> substitutions [
+	^ self config at: 'substitutions'  ifAbsentPut: [ Dictionary new].
+]
+
 { #category : #accessing }
 TiddlyWiki >> syncRemoteLocalDestructive [