ASD file is created when a Microsoft Document application triggers AutoSave. This file format is created to prevent loss from unplanned disruptions like system crash or power outage.
If a scheduled log off or shut down is set then AutoSave is not triggered and ASD file is not created. This file format is stored in temporary folder unless the location is mentioned by the user. Microsoft Office applications use AutoSave feature to periodically save the document on which the user is working. The time duration for AutoSave can be set by the user and the document is saved after that time in ASD file.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .ASD file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .ASD file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .ASD file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.