diff --git a/zefie_wtvp_minisrv/includes/ServiceVault/wtv-disk/sync.js b/zefie_wtvp_minisrv/includes/ServiceVault/wtv-disk/sync.js
index 43b95c2f..e638fd5f 100644
--- a/zefie_wtvp_minisrv/includes/ServiceVault/wtv-disk/sync.js
+++ b/zefie_wtvp_minisrv/includes/ServiceVault/wtv-disk/sync.js
@@ -32,7 +32,7 @@ if (request_headers['wtv-request-type'] == 'download') {
 
             // delete partition/path if force, and not no_delete
             if (force_update && !no_delete) {
-                // don't delete Brower partition, ever, but allow deleting of Browser partition subdirs
+                // don't delete Browser partition, ever, but allow deleting of Browser partition subdirs
                 if (!diskmap_group_data.base.match(/disk\/browser(\/)?$/i)) {
                     if (diskmap_group_data.client_group_data.path.toLowerCase() == diskmap_group_data.base.toLowerCase()) {
                         wtvdl.delete(diskmap_group_data.base, null);
@@ -82,7 +82,6 @@ if (request_headers['wtv-request-type'] == 'download') {
                         var get_url = service_name + ":/" + update_list[k].location + "?";
                         if (update_list[k].compress === false) get_url += "dont_compress=true&";
                         if (update_list[k].type) get_url += "content_type=" + escape(update_list[k].type) + "&";
-                        get_url = get_url.slice();
                         wtvdl.get(update_list[k].file.replace(diskmap_group_data.base, ""), update_list[k].file, get_url, diskmap_group_name, update_list[k].checksum, update_list[k].uncompressed_size || null, update_list[k].original_filename)
                         break;
                 }
@@ -121,8 +120,8 @@ if (request_headers['wtv-request-type'] == 'download') {
     function processGroup(diskmap_primary_group, diskmap_group_data, diskmap_subgroup = null, version = 0) {
         // parse webtv post
         var output_data = '';
-        var post_data = new Array();
-        var client_group_data = new Array();
+        var post_data = [];
+        var client_group_data = [];
         if (request_headers.post_data) {
             post_data = request_headers.post_data.toString(CryptoJS.enc.Latin1).split("\n");
             client_group_data = wtvdl.getGroupDataFromClientPost(request_headers.post_data.toString(CryptoJS.enc.Latin1));
@@ -133,7 +132,7 @@ if (request_headers['wtv-request-type'] == 'download') {
         var post_data_last_modified = false;
         var post_data_content_length = false;
         var post_data_current_group_state = false;
-        var post_data_fileinfo = new Array();
+        var post_data_fileinfo = [];
         var entry_type = false;
         var post_data_current_version = false;
         var post_data_current_checksum = false;
@@ -159,7 +158,7 @@ if (request_headers['wtv-request-type'] == 'download') {
 
                     switch (post_data_line_name.toLowerCase()) {
                         case "last-modified":
-                            post_data_last_modified = (new Date(new Date(Date.parse(post_data_line_data)).toUTCString()) / 1000);
+                            post_data_last_modified = Math.floor(Date.parse(post_data_line_data) / 1000);
                             break;
                         case "content-length":
                             post_data_content_length = parseInt(post_data_line_data);
@@ -177,7 +176,7 @@ if (request_headers['wtv-request-type'] == 'download') {
                             post_data_current_checksum = post_data_line_data;
                             break;
                         case "last-checkup-time":
-                            post_data_last_checkup_time = (new Date(new Date(Date.parse(post_data_line_data)).toUTCString()) / 1000);
+                            post_data_last_checkup_time = Math.floor(Date.parse(post_data_line_data) / 1000);
                             break;
                     }
                 } else {
@@ -190,7 +189,7 @@ if (request_headers['wtv-request-type'] == 'download') {
                         var post_data_current_path = ((entry_type == "file") ? (post_data_current_directory + post_data_current_file) : post_data_current_directory);
                         var index = post_data_current_path.replace(/[\:\/]/g, "_").toLowerCase() + "_" + post_data_current_group;
                         if (index.match(/\/$/)) entry_type = "folder";
-                        if (!post_data_fileinfo[index]) post_data_fileinfo[index] = new Array();
+                        if (!post_data_fileinfo[index]) post_data_fileinfo[index] = {};
                         post_data_fileinfo[index].entry_type = entry_type;
                         post_data_fileinfo[index].file = post_data_current_path;
                         post_data_fileinfo[index].group = post_data_current_group;
@@ -205,7 +204,7 @@ if (request_headers['wtv-request-type'] == 'download') {
                 }
             }
         });
-        var wtv_download_list = new Array();
+        var wtv_download_list = [];
         var newest_file_epoch = version;
         Object.keys(diskmap_group_data.files).forEach(function (k) {
             if (!diskmap_group_data.files[k].location) diskmap_group_data.files[k].location = wtvshared.makeSafePath(diskmap_group_data.location,diskmap_group_data.files[k].file.replace(diskmap_group_data.base, ""), true);
@@ -218,12 +217,12 @@ if (request_headers['wtv-request-type'] == 'download') {
 
             if (diskmap_data_file) {
                 var diskmap_file_stat = fs.lstatSync(diskmap_data_file);
-                var diskmap_file_data = new Buffer.from(fs.readFileSync(diskmap_data_file, {
+                var diskmap_file_data = Buffer.from(fs.readFileSync(diskmap_data_file, {
                     encoding: null,
                     flags: 'r'
                 }));
                 diskmap_group_data.files[k].base = diskmap_group_data.base;
-                diskmap_group_data.files[k].last_modified = (new Date(new Date(diskmap_file_stat.mtime).toUTCString()) / 1000);
+                diskmap_group_data.files[k].last_modified = Math.floor(diskmap_file_stat.mtime.getTime() / 1000);
                 diskmap_group_data.files[k].content_length = diskmap_file_stat.size;
                 diskmap_group_data.files[k].action = (diskmap_group_data.files[k].action) ? diskmap_group_data.files[k].action.toUpperCase() : "GET";
 
@@ -245,6 +244,8 @@ if (request_headers['wtv-request-type'] == 'download') {
 
                 diskmap_group_data.files[k].invalid = true;
                 wtv_download_list.push(diskmap_group_data.files[k]);
+                // Clean up file data from memory
+                diskmap_file_data = null;
             }
         });
         // check to see if client says they have this version
@@ -252,9 +253,9 @@ if (request_headers['wtv-request-type'] == 'download') {
         Object.keys(wtv_download_list).forEach(function (k) {
             wtv_download_list[k].version = newest_file_epoch;
             Object.keys(post_data_fileinfo).forEach(function (g) {
-                if (post_data_fileinfo[g].file == wtv_download_list[k] || post_data_fileinfo[g].file == wtv_download_list[k].base) {
+                if (post_data_fileinfo[g].file == wtv_download_list[k].file || post_data_fileinfo[g].file == wtv_download_list[k].base) {
                     diskmap_group_data.group_exists = true;
-                    if (diskmap_group_data.files[k].checksum && diskmap_group_data.files[k].checksum.toLowerCase() == post_data_fileinfo[g].checksum) wtv_download_list[k].invalid = false;
+                    if (wtv_download_list[k].checksum && wtv_download_list[k].checksum.toLowerCase() == post_data_fileinfo[g].checksum) wtv_download_list[k].invalid = false;
                     else if (post_data_fileinfo[g].version == wtv_download_list[k].version && post_data_fileinfo[g].state != "invalid") wtv_download_list[k].invalid = false;
                 }
             });
@@ -274,11 +275,10 @@ if (request_headers['wtv-request-type'] == 'download') {
         });
 
         if (diskmap_json_file != null) {
-            if (fs.existsSync(diskmap_json_file)) {
-                try {
-                    // read diskmap
-                    var json_stats = fs.lstatSync(diskmap_json_file);
-                    var diskmap_data = JSON.parse(fs.readFileSync(diskmap_json_file).toString());
+            try {
+                // read diskmap
+                var json_stats = fs.lstatSync(diskmap_json_file);
+                var diskmap_data = JSON.parse(fs.readFileSync(diskmap_json_file).toString());
                     if (!diskmap_data[request_headers.query.group]) {
                         throw ("Invalid diskmap data (group does not match)");
                     }
@@ -287,12 +287,12 @@ if (request_headers['wtv-request-type'] == 'download') {
                     if (!diskmap_data.location) {
                         Object.keys(diskmap_data).forEach(function (k) {
                             if (diskmap_data[k]) {
-                                diskmap_data[k].version = (new Date(new Date(json_stats.mtime).toUTCString()) / 1000);
+                                diskmap_data[k].version = Math.floor(json_stats.mtime.getTime() / 1000);
                                 data += processGroup(request_headers.query.group, diskmap_data[k], k, diskmap_data.version);
                             }
                         });
                     } else {
-                        diskmap_data.version = (new Date(new Date(json_stats.mtime).toUTCString()) / 1000);
+                        diskmap_data.version = Math.floor(json_stats.mtime.getTime() / 1000);
                         data = processGroup(request_headers.query.group, diskmap_data, null, diskmap_data.version);
                     }
 
@@ -303,7 +303,6 @@ if (request_headers['wtv-request-type'] == 'download') {
                     data = errpage[1];
                     console.error(" # " + service_name+":/sync error", e);
                 }
-            }
         } else {
             var errpage = wtvshared.doErrorPage(404, "The requested DiskMap does not exist.");
             headers = errpage[0];
diff --git a/zefie_wtvp_minisrv/includes/classes/WTVDisk.js b/zefie_wtvp_minisrv/includes/classes/WTVDisk.js
index 5821bd45..95b99ea2 100644
--- a/zefie_wtvp_minisrv/includes/classes/WTVDisk.js
+++ b/zefie_wtvp_minisrv/includes/classes/WTVDisk.js
@@ -2,6 +2,9 @@
  * wtv/download-list creation helper class
  * By: zefie
  */
+
+const { WTVShared, clientShowAlert } = require("./WTVShared.js");
+
 class WTVDownloadList {
 
     download_list = "";
@@ -16,11 +19,10 @@ class WTVDownloadList {
      * @param {string} service_name Service name to use in wtv-urls
      */
     constructor(minisrv_config, service_name = "wtv-disk") {
-        var { WTVShared, clientShowAlert } = require("./WTVShared.js");
         this.minisrv_config = minisrv_config;
         this.wtvshared = new WTVShared(minisrv_config);
         this.clientShowAlert = clientShowAlert;
-        this.service_name = service_name
+        this.service_name = service_name;
         this.clear();
     }
 
@@ -51,7 +53,7 @@ class WTVDownloadList {
      * @param {string} message Message to display to the client
      */
     display(message) {
-        this.download_list += "DISPLAY " + message + "\n\n";
+        this.download_list += `DISPLAY ${message}\n\n`;
     }
 
     /**
@@ -59,7 +61,7 @@ class WTVDownloadList {
      * @param {string} command client command to execute
      */
     execute(command) {
-        this.download_list += "EXECUTE " + command + "\n\n";
+        this.download_list += `EXECUTE ${command}\n\n`;
     }
 
     /**
@@ -68,8 +70,7 @@ class WTVDownloadList {
      * @param {string} size Size of the desired partition
      */
     createPartition(path, size) {
-        this.download_list += "CREATE " + path + "\n";
-        this.download_list += "partition-size: " + size + "\n\n";
+        this.download_list += `CREATE ${path}\npartition-size: ${size}\n\n`;
     }
 
     /**
@@ -80,10 +81,9 @@ class WTVDownloadList {
      * @param {boolean|null} service_owned Sets service owned flag. (null = don't set)
      */
     createGroup(name, path, state = 'invalid', service_owned = null) {
-        this.download_list += "CREATE-GROUP " + name + "\n";
-        this.download_list += "state: " + state + "\n";
-        if (service_owned !== null) this.download_list += "service-owned: " + service_owned + "\n";
-        this.download_list += "base: " + path + "\n\n";
+        this.download_list += `CREATE-GROUP ${name}\nstate: ${state}\n`;
+        if (service_owned !== null) this.download_list += `service-owned: ${service_owned}\n`;
+        this.download_list += `base: ${path}\n\n`;
     }
 
     /**
@@ -106,9 +106,9 @@ class WTVDownloadList {
      */
     delete(path, group = null, original_filename = null) {
         path = this.checkOriginalName(path, original_filename);
-        this.download_list += "DELETE " + path + "\n";
-        if (group) this.download_list += "group: " + group + "\n\n";
-        else (this.download_list) += "\n";
+        this.download_list += `DELETE ${path}\n`;
+        if (group) this.download_list += `group: ${group}\n\n`;
+        else this.download_list += "\n";
     }
 
     /**
@@ -117,8 +117,7 @@ class WTVDownloadList {
      * @param {string} destination Destination address (wtv url on service) in which to POST upload the file to
      */
     put(path, destination) {
-        this.download_list += "PUT " + path + "\n";
-        this.download_list += "location: " + destination + "\n\n";
+        this.download_list += `PUT ${path}\nlocation: ${destination}\n\n`;
     }
 
     /**
@@ -127,15 +126,15 @@ class WTVDownloadList {
     * @param {string} destination Destination file path in the User Store
     */
     putUserStoreDest(path, destination) {
-        this.put(path, this.service_name + ":/userstore?partialPath=" + escape(destination));
+        this.put(path, `${this.service_name}:/userstore?partialPath=${encodeURIComponent(destination)}`);
     }
 
     /**
      * Alias to putUserStoreDest() that generates the destination
-     * @param {any} path
+     * @param {string} path
      */
     putUserStore(path) {
-        var destination = path.replace("file://", "");
+        const destination = path.replace("file://", "");
         this.putUserStoreDest(path, destination);
     }
     /**
@@ -152,22 +151,22 @@ class WTVDownloadList {
     get(file, path, source, group, checksum = null, uncompressed_size = null, original_filename = null, file_permission = 'r') {
         if (original_filename) {
             file = file.split('/');
-            var file_name = file[file.length - 1];
+            const file_name = file[file.length - 1];
             path = path.replace(file_name, original_filename);
             file.pop();
             if (file.length > 0) file = file.join('/') + '/' + original_filename;
             else file = original_filename;
         }
-        this.download_list += "GET " + file + "\n";
+        this.download_list += `GET ${file}\n`;
 
-		source = source.replace(/\\/g, "/");
-        this.download_list += "group: " + group + "-UPDATE\n";
-        this.download_list += "location: " + source + "\n";
-        this.download_list += "file-permission: " + file_permission + "\n";
-        if (checksum != null) this.download_list += "wtv-checksum: " + checksum + "\n";
-        if (uncompressed_size != null) this.download_list += "wtv-uncompressed-filesize: " + uncompressed_size + "\n";
-        this.download_list += "service-source-location: /webtv/content/" + source.substr(source.indexOf('-') + 1, source.indexOf(':/') - source.indexOf('-') - 1) + "d/" + source.substr(source.indexOf(':/') + 2) + "\n";        
-        this.download_list += "client-dest-location: " + path + "\n\n";
+        source = source.replace(/\\/g, "/");
+        this.download_list += `group: ${group}-UPDATE\n`;
+        this.download_list += `location: ${source}\n`;
+        this.download_list += `file-permission: ${file_permission}\n`;
+        if (checksum != null) this.download_list += `wtv-checksum: ${checksum}\n`;
+        if (uncompressed_size != null) this.download_list += `wtv-uncompressed-filesize: ${uncompressed_size}\n`;
+        this.download_list += `service-source-location: /webtv/content/${source.substring(source.indexOf('-') + 1, source.indexOf(':/'))}d/${source.substring(source.indexOf(':/') + 2)}\n`;        
+        this.download_list += `client-dest-location: ${path}\n\n`;
     }
 
     /**
@@ -178,24 +177,23 @@ class WTVDownloadList {
      */
     checkOriginalName(path, original_name) {
         if (original_name) {
-            var tmp = this.wtvshared.getFilePath(path);
-            if (tmp.length > 0) return tmp + "/" + original_name;
-            return original_name
+            const tmp = this.wtvshared.getFilePath(path);
+            if (tmp.length > 0) return `${tmp}/${original_name}`;
+            return original_name;
         } else return path;
     }
 
     getGroupDataFromClientPost(post_data) {
         if (typeof post_data == 'string') post_data = post_data.split("\n\n");
-        var group_data = [];
-        var i = 0;
+        const group_data = [];
         post_data.forEach(function (v) {
-            if (v.substr(0, 4) == "file") {
-                var block_split = v.split("\n");
-                var group_data_entry = {};
+            if (v.substring(0, 4) == "file") {
+                const block_split = v.split("\n");
+                const group_data_entry = {};
                 group_data_entry.path = block_split[0];
                 block_split.forEach(function (block_section) {
                     if (block_section.indexOf(": ") > 0) {
-                        var block_section_split = block_section.split(": ");
+                        const block_section_split = block_section.split(": ");
                         group_data_entry[block_section_split[0]] = block_section_split[1];
                     }
                 });
@@ -216,12 +214,12 @@ class WTVDownloadList {
     rename(srcfile, destfile, srcgroup, destgroup, original_filename = null) {
         if (original_filename) {
             srcfile = this.checkOriginalName(srcfile, original_filename);
-            destfile = this.checkOriginalName(srcfile, original_filename);
+            destfile = this.checkOriginalName(destfile, original_filename);
         }
-        this.download_list += "RENAME " + srcfile + "\n";
-        this.download_list += "group: " + srcgroup + "-UPDATE\n";
-        this.download_list += "destination-group: " + destgroup + "\n";
-        this.download_list += "location: " + destfile + "\n\n";
+        this.download_list += `RENAME ${srcfile}\n`;
+        this.download_list += `group: ${srcgroup}-UPDATE\n`;
+        this.download_list += `destination-group: ${destgroup}\n`;
+        this.download_list += `location: ${destfile}\n\n`;
     }
 
     /**
@@ -231,10 +229,10 @@ class WTVDownloadList {
      * @param {string} version Version to set group to
      */
     setGroup(group, state, version) {
-        this.download_list += "SET-GROUP " + group + "\n";
-        this.download_list += "state: " + state + "\n";
-        this.download_list += "version: " + version + "\n";
-        this.download_list += "last-checkup-time: " + new Date().toUTCString().replace("GMT", "+0000") + "\n\n";
+        this.download_list += `SET-GROUP ${group}\n`;
+        this.download_list += `state: ${state}\n`;
+        this.download_list += `version: ${version}\n`;
+        this.download_list += `last-checkup-time: ${new Date().toUTCString().replace("GMT", "+0000")}\n\n`;
     }
 
     /**
@@ -242,7 +240,7 @@ class WTVDownloadList {
      * @param {string} group Group to delete
      */
     deleteGroup(group) {
-        this.download_list += "DELETE-GROUP " + group + "\n\n";
+        this.download_list += `DELETE-GROUP ${group}\n\n`;
     }
 
     /**
@@ -251,8 +249,8 @@ class WTVDownloadList {
      * @param {string} path Group base path
      */
     deleteGroupUpdate(group, path) {
-        this.deleteGroup(group + "-UPDATE");
-        this.delete(path + ".GROUP-UPDATE/");
+        this.deleteGroup(`${group}-UPDATE`);
+        this.delete(`${path}.GROUP-UPDATE/`);
     }
 }