diff --git a/app/controllers/dmsf_files_controller.rb b/app/controllers/dmsf_files_controller.rb
index 6504120c..81e0cbeb 100644
--- a/app/controllers/dmsf_files_controller.rb
+++ b/app/controllers/dmsf_files_controller.rb
@@ -140,7 +140,6 @@ class DmsfFilesController < ApplicationController
         if upload
           revision.size = upload.size
           revision.disk_filename = revision.new_storage_filename
-          revision.mime_type = upload.mime_type
           revision.file.attach(
             io: File.open(upload.tempfile_path),
             filename: revision.disk_filename,
@@ -151,7 +150,6 @@ class DmsfFilesController < ApplicationController
       else
         revision.size = last_revision.size
         revision.disk_filename = last_revision.disk_filename
-        revision.mime_type = last_revision.mime_type
       end
       # Custom fields
       revision.copy_custom_field_values(params[:dmsf_file_revision][:custom_field_values], last_revision)
diff --git a/app/controllers/dmsf_upload_controller.rb b/app/controllers/dmsf_upload_controller.rb
index 022f5d77..0b0677cc 100644
--- a/app/controllers/dmsf_upload_controller.rb
+++ b/app/controllers/dmsf_upload_controller.rb
@@ -113,7 +113,6 @@ class DmsfUploadController < ApplicationController
       uploaded_file[:disk_filename] = upload.disk_filename
       uploaded_file[:tempfile_path] = upload.tempfile_path
       uploaded_file[:size] = upload.size
-      uploaded_file[:digest] = upload.digest
       uploaded_file[:mime_type] = upload.mime_type
     end
     commit_files_internal uploaded_files
diff --git a/app/helpers/dmsf_upload_helper.rb b/app/helpers/dmsf_upload_helper.rb
index 550da8d0..7ab36977 100644
--- a/app/helpers/dmsf_upload_helper.rb
+++ b/app/helpers/dmsf_upload_helper.rb
@@ -68,7 +68,6 @@ module DmsfUploadHelper
         new_revision.patch_version = if committed_file[:version_patch].present?
                                        DmsfUploadHelper.db_version committed_file[:version_patch]
                                      end
-        new_revision.mime_type = committed_file[:mime_type]
         new_revision.size = committed_file[:size]
         # Custom fields
         new_revision.copy_custom_field_values(committed_file[:custom_field_values])
diff --git a/app/models/dmsf_file_revision.rb b/app/models/dmsf_file_revision.rb
index 0bf731ab..da7231d6 100644
--- a/app/models/dmsf_file_revision.rb
+++ b/app/models/dmsf_file_revision.rb
@@ -115,7 +115,11 @@ class DmsfFileRevision < ApplicationRecord
   end
 
   def checksum
-    file.blob.checksum
+    file.blob&.checksum
+  end
+
+  def mime_type
+    file.blob&.content_type
   end
 
   def visible?(_user = nil)
@@ -231,7 +235,6 @@ class DmsfFileRevision < ApplicationRecord
     new_revision.dmsf_file = dmsf_file
     new_revision.disk_filename = disk_filename
     new_revision.size = size
-    new_revision.mime_type = mime_type
     new_revision.title = title
     new_revision.description = description
     new_revision.workflow = workflow
@@ -322,7 +325,7 @@ class DmsfFileRevision < ApplicationRecord
     file.attach(
       io: open_file,
       filename: dmsf_file.name,
-      content_type: mime_type,
+      content_type: mime_type.presence || Redmine::MimeType.of(disk_filename),
       identify: false
     )
   end
diff --git a/app/models/dmsf_upload.rb b/app/models/dmsf_upload.rb
index fe136be5..c04d2e5a 100644
--- a/app/models/dmsf_upload.rb
+++ b/app/models/dmsf_upload.rb
@@ -32,7 +32,7 @@ class DmsfUpload
     if a
       uploaded = {
         disk_filename: DmsfHelper.temp_filename(a.filename),
-        content_type: a.content_type,
+        content_type: a.content_type.presence || 'application/octet-stream',
         original_filename: a.filename,
         comment: uploaded_file[:description],
         tempfile_path: a.diskfile,
@@ -53,7 +53,6 @@ class DmsfUpload
       @size = 0
       @tempfile_path = ''
       @token = ''
-      @digest = ''
       if RedmineDmsf.empty_minor_version_by_default?
         @major_version = 1
         @minor_version = nil
@@ -85,7 +84,6 @@ class DmsfUpload
     end
     @tempfile_path = uploaded[:tempfile_path]
     @token = uploaded[:token]
-    @digest = uploaded[:digest]
 
     if file.nil? || file.last_revision.nil?
       @title = DmsfFileRevision.filename_to_title(@name)
diff --git a/app/views/dmsf_files/show.api.rsb b/app/views/dmsf_files/show.api.rsb
index 80feeb9e..0b9d8dec 100644
--- a/app/views/dmsf_files/show.api.rsb
+++ b/app/views/dmsf_files/show.api.rsb
@@ -35,7 +35,7 @@ api.dmsf_file do
         api.dmsf_workflow_started_by_user_id r.dmsf_workflow_started_by_user_id
         api.dmsf_workflow_started_at r.dmsf_workflow_started_at
         api.dmsf_worklfow_state r.workflow_str(false)
-        api.digest r.digest
+        api.digest r.checksum
         render_api_custom_values r.visible_custom_field_values, api
       end
     end
diff --git a/db/migrate/20251128131001_remove_digest_from_revision.rb b/db/migrate/20251128131001_remove_duplicities_from_revision.rb
similarity index 71%
rename from db/migrate/20251128131001_remove_digest_from_revision.rb
rename to db/migrate/20251128131001_remove_duplicities_from_revision.rb
index d418308d..afaf4517 100644
--- a/db/migrate/20251128131001_remove_digest_from_revision.rb
+++ b/db/migrate/20251128131001_remove_duplicities_from_revision.rb
@@ -18,13 +18,17 @@
 # <https://www.gnu.org/licenses/>.
 
 # Add column
-class RemoveDigestFromRevision < ActiveRecord::Migration[7.0]
+class RemoveDuplicitiesFromRevision < ActiveRecord::Migration[7.0]
   def up
     remove_column :dmsf_file_revisions, :digest
+    remove_column :dmsf_file_revisions, :mime_type
+    # We need to keep the size despite the fact that it's duplicated in active_storage_blobs to speed up the main
+    # document view
   end
 
   def down
     add_column :dmsf_file_revisions, :digest, :string, limit: 64, default: '', null: false
-    # Recalculation of checksums for all revisions is technically possible but costs are too high.
+    add_column :dmsf_file_revisions, :mime_type, :string
+    # Recalculation of these columns for all revisions is technically possible but costs are too high.
   end
 end
diff --git a/lib/redmine_dmsf/webdav/dmsf_resource.rb b/lib/redmine_dmsf/webdav/dmsf_resource.rb
index 39ca604a..13bd514d 100644
--- a/lib/redmine_dmsf/webdav/dmsf_resource.rb
+++ b/lib/redmine_dmsf/webdav/dmsf_resource.rb
@@ -599,7 +599,6 @@ module RedmineDmsf
         new_revision.dmsf_file = f
         new_revision.user = User.current
         new_revision.name = basename
-        new_revision.mime_type = Redmine::MimeType.of(new_revision.name)
 
         # Phusion passenger does not have a method "length" in its model
         # however, includes a size method - so we instead use reflection
@@ -786,9 +785,7 @@ module RedmineDmsf
           r.dmsf_file = f
           r.user = User.current
           r.name = basename
-          r.mime_type = Redmine::MimeType.of(r.name)
           r.size = 0
-          r.digest = 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855'
           r.disk_filename = r.new_storage_filename
           r.available_custom_fields.each do |cf| # Add default value for CFs not existing
             next unless cf.default_value
diff --git a/test/fixtures/active_storage_blobs.yml b/test/fixtures/active_storage_blobs.yml
index 83c9a90f..b3523d05 100644
--- a/test/fixtures/active_storage_blobs.yml
+++ b/test/fixtures/active_storage_blobs.yml
@@ -3,7 +3,7 @@ active_storage_blob_1:
   id:           1
   key:          '5lge4yv88jwzt7xl76vri2be1v01'
   filename:     'test.txt'
-  content_type: 'tect/plain'
+  content_type: 'text/plain'
   metadata:     '{"identified":true,"analyzed":true}'
   service_name: 'test'
   byte_size:    3
diff --git a/test/functional/dmsf_files_controller_test.rb b/test/functional/dmsf_files_controller_test.rb
index e29fa353..d7f6db5c 100644
--- a/test/functional/dmsf_files_controller_test.rb
+++ b/test/functional/dmsf_files_controller_test.rb
@@ -150,6 +150,6 @@ class DmsfFilesControllerTest < RedmineDmsf::Test::TestCase
            }
     end
     assert_redirected_to dmsf_folder_path(id: @file1.project)
-    assert_not_nil @file1.last_revision.digest
+    assert_not_nil @file1.last_revision.checksum
   end
 end
diff --git a/test/integration/webdav/dmsf_webdav_put_test.rb b/test/integration/webdav/dmsf_webdav_put_test.rb
index c0b2638d..03b1cbe5 100644
--- a/test/integration/webdav/dmsf_webdav_put_test.rb
+++ b/test/integration/webdav/dmsf_webdav_put_test.rb
@@ -90,7 +90,7 @@ class DmsfWebdavPutTest < RedmineDmsf::Test::IntegrationTest
         params: '1234',
         headers: @jsmith.merge!({ content_type: :text })
     assert_response :forbidden
-    # Lets check for our file
+    # Let's check for our file
     file = DmsfFile.find_file_by_name @project2, nil, 'test-1234.txt'
     assert_nil file, 'Check for files existance'
   end
@@ -112,7 +112,6 @@ class DmsfWebdavPutTest < RedmineDmsf::Test::IntegrationTest
     file = DmsfFile.find_file_by_name @project1, nil, 'test-1234.txt'
     assert file, 'File test-1234 was not found in projects dmsf folder.'
     assert file.last_revision
-    assert_equal 'MD5', file.last_revision.digest_type
 
     with_settings plugin_redmine_dmsf: { 'dmsf_webdav_use_project_names' => '1',
                                          'dmsf_webdav' => '1',
@@ -381,8 +380,8 @@ class DmsfWebdavPutTest < RedmineDmsf::Test::IntegrationTest
           headers: @jsmith.merge!({ content_type: :text })
       assert_response :created
     end
-    sha = @file1.last_revision.file.checksum
-    assert_equal sha, @file1.last_revision.digest
+    checksum = Digest::MD5.base64digest('1234')
+    assert_equal checksum, @file1.last_revision.checksum
   end
 
   def test_put_version
diff --git a/test/unit/dmsf_file_revision_test.rb b/test/unit/dmsf_file_revision_test.rb
index 369d01db..69afe587 100644
--- a/test/unit/dmsf_file_revision_test.rb
+++ b/test/unit/dmsf_file_revision_test.rb
@@ -89,7 +89,6 @@ class DmsfFileRevisionTest < RedmineDmsf::Test::UnitTest
     r1.title = DmsfFileRevision.filename_to_title(r1.name)
     r1.description = nil
     r1.comment = nil
-    r1.mime_type = nil
     r1.size = 4
 
     r2 = r1.clone
@@ -132,7 +131,6 @@ class DmsfFileRevisionTest < RedmineDmsf::Test::UnitTest
       r1.title = DmsfFileRevision.filename_to_title(r1.name)
       r1.description = nil
       r1.comment = nil
-      r1.mime_type = nil
       r1.size = 4
       assert r1.invalid?
       message = ['Attachment extension .png is not allowed']
@@ -215,32 +213,32 @@ class DmsfFileRevisionTest < RedmineDmsf::Test::UnitTest
   end
 
   def test_protocol_doc
-    @revision1.mime_type = Redmine::MimeType.of('test.doc')
+    @revision1.file.blob.content_type = Redmine::MimeType.of('test.doc')
     assert_equal 'ms-word', @revision1.protocol
   end
 
   def test_protocol_docx
-    @revision1.mime_type = Redmine::MimeType.of('test.docx')
+    @revision1.file.blob.content_type = Redmine::MimeType.of('test.docx')
     assert_equal 'ms-word', @revision1.protocol
   end
 
   def test_protocol_odt
-    @revision1.mime_type = Redmine::MimeType.of('test.odt')
+    @revision1.file.blob.content_type = Redmine::MimeType.of('test.odt')
     assert_equal 'ms-word', @revision1.protocol
   end
 
   def test_protocol_xls
-    @revision1.mime_type = Redmine::MimeType.of('test.xls')
+    @revision1.file.blob.content_type = Redmine::MimeType.of('test.xls')
     assert_equal 'ms-excel', @revision1.protocol
   end
 
   def test_protocol_xlsx
-    @revision1.mime_type = Redmine::MimeType.of('test.xlsx')
+    @revision1.file.blob.content_type = Redmine::MimeType.of('test.xlsx')
     assert_equal 'ms-excel', @revision1.protocol
   end
 
   def test_protocol_ods
-    @revision1.mime_type = Redmine::MimeType.of('test.ods')
+    @revision1.file.blob.content_type = Redmine::MimeType.of('test.ods')
     assert_equal 'ms-excel', @revision1.protocol
   end