diff --git a/app/models/asset.rb b/app/models/asset.rb
index 851d18038..87aeb32c9 100644
--- a/app/models/asset.rb
+++ b/app/models/asset.rb
@@ -8,6 +8,11 @@ class Asset < ApplicationRecord
   include ActiveStorageFileUtil
   include ActiveStorageConcerns
 
+  attr_accessor :file_file_name
+  attr_accessor :file_file_size
+  attr_accessor :file_content_type
+  attr_accessor :file_updated_at
+
   require 'tempfile'
   # Lock duration set to 30 minutes
   LOCK_DURATION = 60 * 30
diff --git a/app/models/experiment.rb b/app/models/experiment.rb
index 65c6fe8e8..5e62f4f0c 100644
--- a/app/models/experiment.rb
+++ b/app/models/experiment.rb
@@ -2,6 +2,11 @@ class Experiment < ApplicationRecord
   include ArchivableModel
   include SearchableModel
   include SearchableByNameModel
+  attr_accessor :workflowimg_file_name
+  attr_accessor :workflowimg_file_size
+  attr_accessor :workflowimg_content_type
+  attr_accessor :workflowimg_updated_at
+
 
   belongs_to :project, inverse_of: :experiments, touch: true
   belongs_to :created_by,
diff --git a/app/models/step.rb b/app/models/step.rb
index ec8d3960a..600921c09 100644
--- a/app/models/step.rb
+++ b/app/models/step.rb
@@ -127,7 +127,7 @@ class Step < ApplicationRecord
   end
 
   def asset_position(asset)
-    assets.order(:file_updated_at).each_with_index do |step_asset, i|
+    assets.order(:updated_at).each_with_index do |step_asset, i|
       return { count: assets.count, pos: i } if asset.id == step_asset.id
     end
   end
diff --git a/app/services/model_exporters/model_exporter.rb b/app/services/model_exporters/model_exporter.rb
index 38975ec79..a4e88424a 100644
--- a/app/services/model_exporters/model_exporter.rb
+++ b/app/services/model_exporters/model_exporter.rb
@@ -15,22 +15,15 @@ module ModelExporters
     def copy_files(assets, attachment_name, dir_name)
       assets.flatten.each do |a|
         next unless a.public_send(attachment_name).attached?
+        blob = a.public_send(attachment_name).blob
+        dir = FileUtils.mkdir_p(File.join(dir_name, a.id.to_s)).first
+        destination_path = File.join(dir, a.file_name)
+
+        blob.open do |file|
+          FileUtils.cp(file.path, destination_path)
+        end
 
         yield if block_given?
-        dir = FileUtils.mkdir_p(File.join(dir_name, a.id.to_s)).first
-
-        tempfile = Tempfile.new
-        tempfile.binmode
-        a.public_send(attachment_name).blob.download { |chunk| tempfile.write(chunk) }
-        tempfile.flush
-        tempfile.rewind
-        FileUtils.cp(
-          tempfile.path,
-          File.join(dir, a.file_name)
-        )
-      ensure
-        tempfile.close
-        tempfile.unlink
       end
     end