What Is a UDF File?
Others could be Ricoh address books that hold user information.
UDF scripts that are Excel user-defined functions are created and used byMicrosoft Excelvia its built-inMicrosoft Visual Basic for Applicationstool.

UDF files that are Ricoh address book files require the discontinued SmartDeviceMonitor for Admin software from Ricoh.
Another way to open this file is to use Notepad oranother text editor.
This may or may not be the case with UDF files but it’s worth a try.
UDF files in MS Excel have the potential to store malicious scripts.
See ourList of Executable File Extensionsfor a listing of file extensions to avoid and why.
Consider a disc that you want to besaved as an ISOor in a video format likeMPEG.
Need your UDF content to be in a video file format?
Keep in mind that some devices will not support every possible file system.
Still Can’t launch the File?
Instead, you probably have something that doesn’t even end in UDF.
For example, thePDFformat is really popular and is spelled in almost the exact same way as UDF.
The point here is to double-check the file extension.
Research the extension of your specific file to find which programs can open or convert it.
UDF 2.60 is the latest version of the UDF standard.
It supportsBlu-rayand is used by most modern operating systems.