diff --git a/models/attachments.js b/models/attachments.js
index 8fdc99d53..2d1000b16 100644
--- a/models/attachments.js
+++ b/models/attachments.js
@@ -4,7 +4,7 @@ import { createBucket } from './lib/grid/createBucket';
 import fs from 'fs';
 import path from 'path';
 import { AttachmentStoreStrategyFilesystem, AttachmentStoreStrategyGridFs} from '/models/lib/attachmentStoreStrategy';
-import FileStoreStrategyFactory, {moveToStorage} from '/models/lib/fileStoreStrategy';
+import FileStoreStrategyFactory, {moveToStorage, STORAGE_NAME_FILESYSTEM, STORAGE_NAME_GRIDFS} from '/models/lib/fileStoreStrategy';
 
 let attachmentBucket;
 if (Meteor.isServer) {
@@ -34,10 +34,10 @@ Attachments = new FilesCollection({
   onAfterUpload(fileObj) {
     // current storage is the filesystem, update object and database
     Object.keys(fileObj.versions).forEach(versionName => {
-      fileObj.versions[versionName].storage = "fs";
+      fileObj.versions[versionName].storage = STORAGE_NAME_FILESYSTEM;
     });
     Attachments.update({ _id: fileObj._id }, { $set: { "versions" : fileObj.versions } });
-    moveToStorage(fileObj, "gridfs", fileStoreStrategyFactory);
+    moveToStorage(fileObj, STORAGE_NAME_GRIDFS, fileStoreStrategyFactory);
   },
   interceptDownload(http, fileObj, versionName) {
     const ret = fileStoreStrategyFactory.getFileStrategy(this, fileObj, versionName).interceptDownload(http);
diff --git a/models/lib/fileStoreStrategy.js b/models/lib/fileStoreStrategy.js
index c15bd6cc2..b49c894e3 100644
--- a/models/lib/fileStoreStrategy.js
+++ b/models/lib/fileStoreStrategy.js
@@ -2,6 +2,9 @@ import fs from 'fs';
 import { createObjectId } from './grid/createObjectId';
 import { createInterceptDownload } from './fsHooks/createInterceptDownload';
 
+export const STORAGE_NAME_FILESYSTEM = "fs";
+export const STORAGE_NAME_GRIDFS     = "gridfs";
+
 /** Factory for FileStoreStrategy */
 export default class FileStoreStrategyFactory {
 
@@ -28,18 +31,18 @@ export default class FileStoreStrategyFactory {
       if (!storage) {
         if (fileObj.meta.source == "import") {
           // uploaded by import, so it's in GridFS (MongoDB)
-          storage = "gridfs";
+          storage = STORAGE_NAME_GRIDFS;
         } else {
           // newly uploaded, so it's at the filesystem
-          storage = "fs";
+          storage = STORAGE_NAME_FILESYSTEM;
         }
       }
     }
     let ret;
-    if (["fs", "gridfs"].includes(storage)) {
-      if (storage == "fs") {
+    if ([STORAGE_NAME_FILESYSTEM, STORAGE_NAME_GRIDFS].includes(storage)) {
+      if (storage == STORAGE_NAME_FILESYSTEM) {
         ret = new this.classFileStoreStrategyFilesystem(filesCollection, fileObj, versionName);
-      } else if (storage == "gridfs") {
+      } else if (storage == STORAGE_NAME_GRIDFS) {
         ret = new this.classFileStoreStrategyGridFs(this.gridFsBucket, filesCollection, fileObj, versionName);
       }
     }
@@ -185,7 +188,7 @@ export class FileStoreStrategyGridFs extends FileStoreStrategy {
    * @return the storage name
    */
   getStorageName() {
-    return "gridfs";
+    return STORAGE_NAME_GRIDFS;
   }
 
   /** returns the GridFS Object-Id
@@ -255,7 +258,7 @@ export class FileStoreStrategyFilesystem extends FileStoreStrategy {
    * @return the storage name
    */
   getStorageName() {
-    return "fs";
+    return STORAGE_NAME_FILESYSTEM;
   }
 }