diff --git a/chrome/content/zotero/xpcom/storage/storageEngine.js b/chrome/content/zotero/xpcom/storage/storageEngine.js
index 8c7b991971..db3909f4f3 100644
--- a/chrome/content/zotero/xpcom/storage/storageEngine.js
+++ b/chrome/content/zotero/xpcom/storage/storageEngine.js
@@ -34,6 +34,7 @@ if (!Zotero.Sync.Storage) {
  * @param {Object} options
  * @param {Integer} options.libraryID
  * @param {Object} options.controller - Storage controller instance (ZFS_Controller/WebDAV_Controller)
+ * @param {Function} [onProgress] - Function to run when a request finishes: f(progress, progressMax)
  * @param {Function} [onError] - Function to run on error
  * @param {Boolean} [stopOnError]
  */
@@ -52,11 +53,15 @@ Zotero.Sync.Storage.Engine = function (options) {
 	this.library = Zotero.Libraries.get(options.libraryID);
 	this.controller = options.controller;
 	
+	this.numRequests = 0;
+	this.requestsRemaining = 0;
+	
 	this.local = Zotero.Sync.Storage.Local;
 	this.utils = Zotero.Sync.Storage.Utilities;
 	
 	this.setStatus = options.setStatus || function () {};
 	this.onError = options.onError || function (e) {};
+	this.onProgress = options.onProgress || function (progress, progressMax) {};
 	this.stopOnError = options.stopOnError || false;
 	
 	this.queues = [];
@@ -136,6 +141,7 @@ Zotero.Sync.Storage.Engine.prototype.start = Zotero.Promise.coroutine(function*
 	}
 	
 	var filesEditable = Zotero.Libraries.get(libraryID).filesEditable;
+	this.requestsRemaining = 0;
 	
 	// Check for updated files to upload
 	if (!filesEditable) {
@@ -322,8 +328,13 @@ Zotero.Sync.Storage.Engine.prototype.queueItem = Zotero.Promise.coroutine(functi
 			libraryID: this.libraryID,
 			name: item.libraryKey,
 			onStart: request => this.controller[fn](request),
-			onProgress: this.onProgress
+			onStop: () => {
+				this.requestsRemaining--;
+				this.onProgress(this.numRequests - this.requestsRemaining, this.numRequests);
+			}
 		});
 		return request.start();
 	});
+	this.numRequests++;
+	this.requestsRemaining++;
 })
diff --git a/chrome/content/zotero/xpcom/sync/syncRunner.js b/chrome/content/zotero/xpcom/sync/syncRunner.js
index ed5d6e55f5..c93abcfa47 100644
--- a/chrome/content/zotero/xpcom/sync/syncRunner.js
+++ b/chrome/content/zotero/xpcom/sync/syncRunner.js
@@ -609,12 +609,27 @@ Zotero.Sync.Runner_Module = function (options = {}) {
 	 */
 	var _doFileSync = Zotero.Promise.coroutine(function* (libraries, options) {
 		Zotero.debug("Starting file syncing");
-		this.setSyncStatus(Zotero.getString('sync.status.syncingFiles'));
 		var resyncLibraries = []
 		for (let libraryID of libraries) {
 			_stopCheck();
+			this.setSyncStatus(
+				Zotero.getString(
+					'sync.status.syncingFilesInLibrary', Zotero.Libraries.get(libraryID).name
+				)
+			);
 			try {
-				let opts = {};
+				let opts = {
+					onProgress: (progress, progressMax) => {
+						var remaining = progressMax - progress;
+						this.setSyncStatus(
+							Zotero.getString(
+								'sync.status.syncingFilesInLibraryWithRemaining',
+								[Zotero.Libraries.get(libraryID).name, remaining],
+								remaining
+							)
+						);
+					}
+				};
 				Object.assign(opts, options);
 				opts.libraryID = libraryID;
 				
diff --git a/chrome/locale/en-US/zotero/zotero.properties b/chrome/locale/en-US/zotero/zotero.properties
index af27d7518a..06cbdead19 100644
--- a/chrome/locale/en-US/zotero/zotero.properties
+++ b/chrome/locale/en-US/zotero/zotero.properties
@@ -967,6 +967,8 @@ sync.status.processingUpdatedData	= Processing updated data from sync server
 sync.status.uploadingData			= Uploading data to sync server
 sync.status.uploadAccepted			= Upload accepted \u2014 waiting for sync server
 sync.status.syncingFiles			= Syncing files
+sync.status.syncingFilesInLibrary = Syncing files in %S
+sync.status.syncingFilesInLibraryWithRemaining = Syncing files in %1$S (%2$S remaining);Syncing files in %1$S (%2$S remaining)
 sync.status.syncingFullText        = Syncing full-text content
 
 sync.storage.mbRemaining			= %SMB remaining