TabAppendDriveLabel (Show Drive Labels in Tabs)

The script add-in TabAppendDriveLabel appends the label of the drive that is displayed in a tab to the tab name if it detects the drive as removable (e.g. a thumb drive) or external (e.g. external HDD). In all other cases, the tab name remains unchanged.

How to setup and use

:one: Save EventTabAppendDriveLabel.js.txt to

%appdata%\GPSoftware\Directory Opus\Script AddIns

:two: Edit the list of internal drives.

While identifying removable drives is very easy, properly detecting external drives is not trivial. That's why the script contains a hard coded list of internal drives that needs to be adjusted to your system. Edit the following line in the script:

var internalDrives = 'CDEFGH';

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The script's inner workings

function OnInit(initData) { = 'TabAppendDriveLabel';
    initData.version = '2023-07-05';
    initData.url = '';
    initData.desc = '';
    initData.default_enable = true;
    initData.min_version = '12.0';

function OnAfterFolderChange(afterFolderChangeData) {
    if (!afterFolderChangeData.result) return;

    var cmd = DOpus.Create().Command();
    var tab =;
    cmd.RunCommand('Go TABNAME');

    var tabDrive = GetDriveFromTab(tab);

    if (!tabDrive) return; // E.g. node 'This PC'

    if (tabDrive.type == 'removable' || (tabDrive.type == 'fixed' && !IsInternalDrive(tabDrive))) {
        cmd.RunCommand('Go TABNAME="' + tab.displayed_label + ' [' + tabDrive.label + ']"');

function GetDriveFromTab(tab) {
    var tabDrive = tab.path.Split()(0);
    var allDrives = DOpus.FSUtil().Drives();

    var d = -1;
    for (var i = 0; i < allDrives.count; i++) {
        if (allDrives(i) == tabDrive) d = i;

    return d < 0 ? false : allDrives(d);

function IsInternalDrive(object) {
    var internalDrives = 'CDEFGH'; // list letters of drives that should always be excluded
    var tmp = String(object);
    if (tmp.substring(1, 3) != ':\\') return false;
    if (internalDrives.indexOf(tmp.substring(0, 1).toUpperCase()) < 0) return false;
    return true;

Extremely useful. Works like a charm for me.
Thanks for taking the time to put this together :clap: