diff --git a/lib/calligraphy/file_resource.rb b/lib/calligraphy/file_resource.rb
index ada5ee5..add5a57 100644
--- a/lib/calligraphy/file_resource.rb
+++ b/lib/calligraphy/file_resource.rb
@@ -4,10 +4,10 @@ module Calligraphy
   class FileResource < Resource
     include Calligraphy::Utils
 
-    def initialize(resource: nil, req: nil, mount: nil)
+    def initialize(resource: nil, req: nil, mount: nil, root_dir: Dir.pwd)
       super
 
-      @root_dir = Dir.pwd
+      @root_dir = root_dir || Dir.pwd
       @src_path = join_paths @root_dir, @request_path
 
       if exists?
diff --git a/lib/calligraphy/move.rb b/lib/calligraphy/move.rb
index 74513df..d58043b 100644
--- a/lib/calligraphy/move.rb
+++ b/lib/calligraphy/move.rb
@@ -7,7 +7,7 @@ module Calligraphy
 
       if @resource.is_true? options[:overwrite]
         to_path = options[:destination].tap { |s| s.slice! @resource.mount_point }
-        to_resource = @resource.class.new resource: to_path, req: @request
+        to_resource = @resource.class.new resource: to_path, req: @request, root_dir: @resource.root_dir
 
         if to_resource.exists?
           to_resource.delete_collection
diff --git a/lib/calligraphy/rails/web_dav_requests_controller.rb b/lib/calligraphy/rails/web_dav_requests_controller.rb
index 9fa682d..9264d97 100644
--- a/lib/calligraphy/rails/web_dav_requests_controller.rb
+++ b/lib/calligraphy/rails/web_dav_requests_controller.rb
@@ -35,7 +35,8 @@ module Calligraphy::Rails
       end
 
       @resource_class = params[:resource_class]
-      @resource = @resource_class.new resource: resource_id, req: request
+      @resource_root_path = params[:resource_root_path]
+      @resource = @resource_class.new resource: resource_id, req: request, root_dir: @resource_root_path
     end
 
     def headers
diff --git a/lib/calligraphy/resource.rb b/lib/calligraphy/resource.rb
index 92d2f25..b5cce6d 100644
--- a/lib/calligraphy/resource.rb
+++ b/lib/calligraphy/resource.rb
@@ -1,9 +1,9 @@
 module Calligraphy
   class Resource
     attr_accessor :contents, :updated_at
-    attr_reader :full_request_path, :mount_point, :request_body, :request_path
+    attr_reader :full_request_path, :mount_point, :request_body, :request_path, :root_dir
 
-    def initialize(resource: nil, req: nil, mount: nil)
+    def initialize(resource: nil, req: nil, mount: nil, root_dir: nil)
       @full_request_path = req&.original_url
       @mount_point = mount || req&.path&.tap { |s| s.slice! resource }
       @request_body = req&.body&.read || ''