diff --git a/mod/photos.php b/mod/photos.php
index 440aae92e..97c0fb22e 100644
--- a/mod/photos.php
+++ b/mod/photos.php
@@ -1141,6 +1141,8 @@ function photos_content(App $a)
 						'$qcomment' => $qcomment,
 						'$rand_num' => Crypto::randomDigits(12),
 						// Dropzone
+                                                //'$max_imagesize'       => Strings::getBytesFromShorthand(DI::config()->get('system', 'maximagesize'));
+                                                // Strings::getBytresFromShorthand not working, so just workaround in template and serve the bare value
 						'$max_imagesize'       => DI::config()->get('system', 'maximagesize'),
 					]);
 				}
@@ -1198,6 +1200,8 @@ function photos_content(App $a)
 						'$qcomment' => $qcomment,
 						'$rand_num' => Crypto::randomDigits(12),
 						// Dropzone
+                                                //'$max_imagesize'       => Strings::getBytesFromShorthand(DI::config()->get('system', 'maximagesize'));
+                                                // Strings::getBytresFromShorthand not working, so just workaround in template and serve the bare value
 						'$max_imagesize'       => DI::config()->get('system', 'maximagesize'),
 					]);
 				}
@@ -1274,6 +1278,8 @@ function photos_content(App $a)
 							'$qcomment' => $qcomment,
 							'$rand_num' => Crypto::randomDigits(12),
 							// Dropzone
+                                                        //'$max_imagesize'       => Strings::getBytesFromShorthand(DI::config()->get('system', 'maximagesize'));
+                                                        // Strings::getBytresFromShorthand not working, so just workaround in template and serve the bare value
 							'$max_imagesize'       => DI::config()->get('system', 'maximagesize'),
 						]);
 					}
diff --git a/src/Content/Conversation.php b/src/Content/Conversation.php
index 586b0bc54..8460f9423 100644
--- a/src/Content/Conversation.php
+++ b/src/Content/Conversation.php
@@ -35,6 +35,7 @@ use Friendica\Core\Renderer;
 use Friendica\Core\Session\Capability\IHandleUserSessions;
 use Friendica\Core\Theme;
 use Friendica\Database\DBA;
+use Friendica\DI;
 use Friendica\Model\Contact;
 use Friendica\Model\Item as ItemModel;
 use Friendica\Model\Post;
@@ -408,10 +409,11 @@ class Conversation
 
 			'$compose_link_title'  => $this->l10n->t('Open Compose page'),
 			'$always_open_compose' => $this->pConfig->get($this->session->getLocalUserId(), 'frio', 'always_open_compose', false),
+
 			// Dropzone
-			//'$max_imagesize'       => DI::config()->get('system', 'maximagesize'),
-			// DI::config.. does not work here, so it is set to a manual value
-			'$max_imagesize'       => 600000,
+                        //'$max_imagesize'       => Strings::getBytesFromShorthand(DI::config()->get('system', 'maximagesize'));
+                        // Strings::getBytresFromShorthand not working, so just workaround in template and serve the bare value
+			'$max_imagesize'       => DI::config()->get('system', 'maximagesize'),
 
 		]);
 
diff --git a/src/Module/Post/Edit.php b/src/Module/Post/Edit.php
index d5b27d648..3e47889b2 100644
--- a/src/Module/Post/Edit.php
+++ b/src/Module/Post/Edit.php
@@ -185,9 +185,9 @@ class Edit extends BaseModule
 
 			'$compose_link_title' => $this->t('Open Compose page'),
 			// Dropzone
-			//'$max_imagesize'       => Strings::getBytesFromShorthand(DI::config()->get('system', 'maximagesize'));
 			//'$max_imagesize'       => \Friendica\\Util\\Strings::getBytesFromShorthand(DI::config()->get('system', 'maximagesize'));
-                        // both not working, so just workaround here until fixed
+			//'$max_imagesize'       => Strings::getBytesFromShorthand(DI::config()->get('system', 'maximagesize'));
+                        // both not working, so just workaround in template and serve the bare value
 			'$max_imagesize'       => DI::config()->get('system', 'maximagesize'),
 		]);
 
diff --git a/src/Object/Post.php b/src/Object/Post.php
index 59617573e..9e569c6a1 100644
--- a/src/Object/Post.php
+++ b/src/Object/Post.php
@@ -1070,6 +1070,8 @@ class Post
 				'$indent'      => $indent,
 				'$rand_num'    => Crypto::randomDigits(12),
 				// Dropzone
+                                //'$max_imagesize'       => Strings::getBytesFromShorthand(DI::config()->get('system', 'maximagesize'));
+                                // Strings::getBytresFromShorthand not working, so just workaround in template and serve the bare value
 				'$max_imagesize' => DI::config()->get('system', 'maximagesize'),
 			]);
 		}
diff --git a/view/templates/item/compose.tpl b/view/templates/item/compose.tpl
index 3db9a64f5..226014ff9 100644
--- a/view/templates/item/compose.tpl
+++ b/view/templates/item/compose.tpl
@@ -96,11 +96,12 @@
 	</div>
 </div>
 <script>
+	// getMByte() is from view/theme/frio/js/dropzone-frio.js
+	// to workaround dysfunctional php Strings:getBytesFromShorthand
 	Dropzone.autoDiscover = false;
-	var maxis = {{$max_imagesize}} / 10^6;
 	var dropzoneCompose = new Dropzone( '#comment-edit-form-{{$id}}',  { 
 		paramName: "userfile", // The name that will be used to transfer the file
-		maxFilesize: maxis, // MB
+		maxFilesize: getMBytes('{{$max_imagesize}}'), // MB
 		previewsContainer: '#dz-previewsCompose',
 		preventDuplicates: true,
 		clickable: true,
diff --git a/view/theme/frio/js/dropzone-frio.js b/view/theme/frio/js/dropzone-frio.js
new file mode 100644
index 000000000..c165633c4
--- /dev/null
+++ b/view/theme/frio/js/dropzone-frio.js
@@ -0,0 +1,24 @@
+function isInteger(value) {
+	return /^\d+$/.test(value);
+}
+
+function getMBytes(value) {
+	var res;
+	if (isInteger(value)) {
+		res = value;
+	} else {
+		eh = value.slice(-1);
+		am = Number(value.slice(0, -1));
+		switch (eh) {
+			case 'k':
+				res = am * 1024;
+				break;
+			case 'm':
+				res = am * 1024 * 1024;
+				break;
+			case 'g':
+				res = am * 1024 * 1024 * 1024;
+		}
+	}
+	return res / 1000000;
+}
diff --git a/view/theme/frio/templates/comment_item.tpl b/view/theme/frio/templates/comment_item.tpl
index 119b5956e..b66b77557 100644
--- a/view/theme/frio/templates/comment_item.tpl
+++ b/view/theme/frio/templates/comment_item.tpl
@@ -66,11 +66,12 @@
 </div>
 
 <script>
+	// getMByte() is from view/theme/frio/js/dropzone-frio.js
+	// to workaround dysfunctional php Strings:getBytesFromShorthand
 	Dropzone.autoDiscover = false;
-	var maxis = {{$max_imagesize}} / 10^6;
 	var dropzone{{$id}} = new Dropzone( '#comment-edit-wrapper-{{$id}}', {
 		paramName: "userfile", // The name that will be used to transfer the file
-		maxFilesize: maxis, // MB
+		maxFilesize: getMBytes('{{$max_imagesize}}'), // MB
 		previewsContainer: '#dz-preview-{{$id}}',
 		preventDuplicates: true,
 		clickable: true,
diff --git a/view/theme/frio/templates/head.tpl b/view/theme/frio/templates/head.tpl
index b506ad278..b7bed6810 100644
--- a/view/theme/frio/templates/head.tpl
+++ b/view/theme/frio/templates/head.tpl
@@ -139,7 +139,8 @@
 		<script type="text/javascript" src="view/theme/frio/js/hovercard.js?v={{$smarty.const.FRIENDICA_VERSION}}"></script>
 	{{/if}}
 	<script type="text/javascript" src="view/theme/frio/js/textedit.js?v={{$smarty.const.FRIENDICA_VERSION}}"></script>
-        <script type="text/javascript" src="vendor/enyo/dropzone/dist/min/dropzone.min.js?v={{$smarty.const.FRIENDICA_VERSION}}"></script>
+	<script type="text/javascript" src="vendor/enyo/dropzone/dist/min/dropzone.min.js?v={{$smarty.const.FRIENDICA_VERSION}}"></script>
+	<script type="text/javascript" src="view/theme/frio/js/dropzone-frio.js?v={{$smarty.const.FRIENDICA_VERSION}}"></script>
 
 	{{* Include the strings which are needed for some js functions (e.g. translation)
 They are loaded into the html <head> so that js functions can use them *}}
diff --git a/view/theme/frio/templates/jot.tpl b/view/theme/frio/templates/jot.tpl
index 2d20fef44..707691094 100644
--- a/view/theme/frio/templates/jot.tpl
+++ b/view/theme/frio/templates/jot.tpl
@@ -180,11 +180,12 @@ can load different content into the jot modal (e.g. the item edit jot)
 </script>
 
 <script>
+	// getMByte() is from view/theme/frio/js/dropzone-frio.js
+	// to workaround dysfunctional php Strings:getBytesFromShorthand
 	Dropzone.autoDiscover = false;
-	var maxis = {{$max_filesize}} / 10^6;
 	var dropzoneJot = new Dropzone( '#jot-modal-content', {
 		paramName: "userfile", // The name that will be used to transfer the file
-		maxFilesize: maxis, // MB
+		maxFilesize: getMBytes('{{$max_imagesize}}'), // MB
 		previewsContainer: '#dz-preview-jot',
 		url: "/media/photo/upload?response=url&album=",
 		accept: function(file, done) {