diff --git a/lib/attachments.js b/lib/attachments.js
index 7845355..403074e 100644
--- a/lib/attachments.js
+++ b/lib/attachments.js
@@ -139,6 +139,7 @@ var plugin = function(schema, options) {
   //  path: String(required). Path to the file in the file system.
   //  name: String(optional). Original Name of the file.
   //  mime: String(optional). Mime type of the file.
+  //  category: String(optional). A top-level grouping for the files.
   schema.methods.attach = function(propertyName, attachmentInfo, cb) {
     var selfModel = this;
     if(propertyNames.indexOf(propertyName) == -1) return cb(new Error('property "' + propertyName + '" was not registered as an attachment property'));
@@ -168,7 +169,12 @@ var plugin = function(schema, options) {
             var finishConversion = function(styleFilePath, atts, cb) {
               var ext = path.extname(styleFilePath);
               var filenameId = options.filenameId ? selfModel[options.filenameId] : selfModel.id;
-              var storageStylePath = '/' + options.directory + '/' + filenameId + '-' + styleName + ext;
+              var storageStylePath;
+              if(attachmentInfo.category) {
+                storageStylePath = '/' + options.directory + '/' + attachmentInfo.category + '/' + filenameId + '-' + styleName + ext;
+              } else {
+                storageStylePath = '/' + options.directory + '/' + filenameId + '-' + styleName + ext;
+              }
               fs.stat(styleFilePath, function(err, stats) {
                 if(err) return cb(err);
                 cb(null, {