DropDat DropDat is designed to offer the simplest possible interface for sending files.  Droplets require no user interaction beyond dragging and dropping files.  When considering distribution of droplets, keep the following limitations in mind:

License Codes

Unlike most other ExpeDat clients, the DropDat Configuration Master will prompt you for a license code the first time you run it on a new system.  Refer to your MTP license summary document for your DropDat license code.  This feature is intended to help server administrators limit access to droplet creation.  Correctly configured droplets will not prompt for a license code.

Click the "Help" button in any configuration dialog to view license details.

Sending Droplets

Droplets are self-contained applications (.exe or .app).  Some email servers and security software may limit or block their transfer.  When emailing a droplet, be sure to notify the recipient in a separate email in case the one containing the droplet is blocked.  See the Distribution section for more about sending droplets to other people.

Platform Support

Windows droplets can only be created, changed, and used on Windows computers.  Likewise, macOS droplets can only be created, changed, and used on macOS computers.

Windows 11 systems running on ARM hardware use code emulation to run x86 binaries.  If droplets fail with "Unable to seek embedded configuration" on ARM hardware, you may need to adjust the emulation settings to "Disable application cache".

Windows systems with EnableCertPaddingCheck enabled are not compatible with DropDat and may prevent droplets from running.  Check with your security administrator if you receive warnings about droplets being unsigned or if they fail with "Unable to seek embedded configuration".

macOS 13 (Ventura) has a bug which prevents .app and .exe entities from being dragged onto any application, including DropDat.  As a workaround, place the DropDat master in your Dock and drag droplets to the Dock icon for editing.  You may also launch DropDat by double clicking on it and then drag a droplet onto the DropDat window.

User Editing

Droplets are not intended to be user editable.  If you wish end-users to be able to edit droplet settings, they will need a copy of DropDat and its license code (subject to the terms of your software license).


Although droplets restrict the user interface available to end-users, they are not intended as a substitute for good security practices.  Ensure that any server-side user account used by droplets is appropriately secured.  For example, accounts which will only be used for droplet uploads may use RestrictHome and WriteOnly.

Downloading and Viewing

Droplets can only send files and create the folders which hold them.  All other ExpeDat functions require use of ExpeDat Desktop or movedat.


File content compression is not supported in DropDat.

Bandwidth Management

Bandwidth management options are not available in DropDat.  Many of these options can be configured at the server on a server-wide, per network, or per user basis.