DMP files are files that contain data that was "dumped" from a program's memory space. DMP files are often created when a program has an error or crashes. The DMP file may also be created by the program "Savedump.exe" on the first reboot after a crash. DMP files are usually named "Memory.dmp." Windows DMP files may be used for troubleshooting system errors and other problems. DMP files can often take up a great amount of space and may need to be deleted frequently.