Conversion of vsdm files to vsd file format

It is certain that vsdm to vsd conversion is related to export between two MS Visio formats. If you really need to re-save .vsdm files from Visio 2013 to older .vsd files, you will have to use Visio and the File ► Save as.. should do the trick. Without Visio it will be pretty impossible task, because it's rarely supported in 3rd party software.

Open VSDM file    Open VSD file

Related software

Microsoft Visio icon

Microsoft Visio

A vector based diagramming software from Microsoft